GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • ASME International  (9)
  • 1
    Online Resource
    Online Resource
    Modeling and Analysis of the Process Energy for Cylindrical Drawing
    ASME International ; 2019
    In:  Journal of Manufacturing Science and Engineering Vol. 141, No. 2 ( 2019-02-01)
    Details
    In: Journal of Manufacturing Science and Engineering, ASME International, Vol. 141, No. 2 ( 2019-02-01)
    Abstract: As energy efficiency increases in importance, researchers have identified manufacturing processes as opportunities where energy consumption can be reduced. Drawing is one widely employed, energy intensive manufacturing process, which could benefit by analysis of energy consumption during operation. To optimize the energy consumption of the drawing process, this paper developed an explicit model to quantify the process energy for the cylindrical drawing process by analyzing the dynamic punch force during the process. In this analysis, the evolution of the stress and strain was analyzed in the drawn part by considering all the structure parameters of the drawn part. The stress and strain analyses were integrated into an overall process energy model, and the behavior of the model was classified into three categories, based on their physical mechanisms, i.e., deformation energy, bending energy, and friction energy. The model was validated using numerical experiments designed by the Taguchi method where two different kinds of materials were tested over 18 runs. The results from the numerical experiments were compared with those from the model, and show that the maximum variation of the process energy predicted by this model is less than 10% for a given part. Sensitivity analysis was performed on the model to understand the contributions of the process parameters on the process energy to guide process optimization for lower energy consumption. The established model can assist in the rapid design of drawn parts with lower embodied energy.
    Type of Medium: Online Resource
    ISSN: 1087-1357 , 1528-8935
    URL: Article
    DOI: 10.1115/1.4041924
    Language: English
    Publisher: ASME International
    Publication Date: 2019
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Numerical Simulation of the Transient Flow in a Centrifugal Pump During Starting Period
    ASME International ; 2010
    In:  Journal of Fluids Engineering Vol. 132, No. 8 ( 2010-08-01)
    Details
    In: Journal of Fluids Engineering, ASME International, Vol. 132, No. 8 ( 2010-08-01)
    Abstract: Computational fluid dynamics were used to study the three-dimensional unsteady incompressible viscous flows in a centrifugal pump during rapid starting period (≈0.12 s). The rotational speed variation of the field around the impeller was realized by a dynamic slip region method, which combines the dynamic mesh method with nonconformal grid boundaries. In order to avoid introducing errors brought by the externally specified unsteady inlet and outlet boundary conditions, a physical model composed of a pipe system and pump was developed for numerical self-coupling computation. The proposed method makes the computation processes more close to the real conditions. Relations between the instantaneous flow evolutions and the corresponding transient flow-rate, head, efficiency and power were analyzed. Relative velocity comparisons between the transient and the corresponding quasisteady results were discussed. Observations of the formations and evolutions of the primary vortices filled between the startup blades illustrate the features of the transient internal flow. The computational transient performances qualitatively agree with published data, indicating that the present method is capable of solving unsteady flow in a centrifugal pump under transient operations.
    Type of Medium: Online Resource
    ISSN: 0098-2202 , 1528-901X
    URL: Article
    DOI: 10.1115/1.4002056
    Language: English
    Publisher: ASME International
    Publication Date: 2010
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Variations of Energy Demand With Process Parameters in Cylindrical Drawing of Stainless Steel
    ASME International ; 2019
    In:  Journal of Manufacturing Science and Engineering Vol. 141, No. 9 ( 2019-09-01)
    Details
    In: Journal of Manufacturing Science and Engineering, ASME International, Vol. 141, No. 9 ( 2019-09-01)
    Abstract: Studies have indicated that reducing the process energy demand is as important as improving the energy conversion efficiency to make manufacturing equipment more energy efficient. However, little work has been done to understand the energy demand characteristics of the widely employed drawing process. In this paper, the energy demand of the cylindrical drawing process under a range of operating parameters was measured and analyzed. Since any energy saving efforts should not have negative effects on the product quality, the forming quality of the drawn part indicated by the maximum thinning and thickening ratios and variation of thickness was also considered. To identify the main contributors to energy demand and forming quality, two sets of experiments were designed based on the Taguchi method. The first set of experiments include three parameters (i.e., punch velocity, blank holder force, and drawn depth) at three levels, while the second set of experiments only include two factors (i.e., punch velocity and blank holder force) at three levels due to their impacts on the forming quality. Analysis of variance (ANOVA) and analysis of means (ANOM) were then used to analyze the experimental results. Finally, grey relational analysis (GRA) was used to reveal the correlation between the forming quality and the process energy. Results show that the mean thickness variation has the strongest relational grading with the process energy, which suggests that the process energy can be used as an effective indicator to predict mean thickness variation of the drawn part. The identified characteristics of the process energy and the forming quality can be used to select process parameters for reduced energy demands of drawing processes.
    Type of Medium: Online Resource
    ISSN: 1087-1357 , 1528-8935
    URL: Article
    DOI: 10.1115/1.4043982
    Language: English
    Publisher: ASME International
    Publication Date: 2019
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    A Hybrid Partial Coherence and Geometry Optics Model of Radiative Property on Coated Rough Surfaces
    ASME International ; 2013
    In:  Journal of Heat Transfer Vol. 135, No. 9 ( 2013-09-01)
    Details
    In: Journal of Heat Transfer, ASME International, Vol. 135, No. 9 ( 2013-09-01)
    Abstract: Thermal and optical engineering applications of electromagnetic wave scattering from rough surfaces include temperature measurement, radiation heating process, etc. Most of the surfaces have random roughness and are often with coating material different from the substrate. However, the understanding of radiative properties of coated rough surfaces is not well addressed at this point. This paper presented a novel hybrid partial coherence and geometry optics (HPCGO) model to improve the generic geometry optics (GO) prediction by incorporating a previously developed partial coherence reflectance equation. In this way, HPCGO expands the applicable region of GO model and largely reduces the computation time of integrating different wavelength results in the regular hybrid model that considers coherence effect only. In this study, the HPCGO model is first compared with the more rigorous Maxwell equations solvers, the finite-difference time-domain (FDTD) method, and integral equation (IE) method. Then, the HPCGO model is applied to study the coherent effect of directional-hemispherical reflectance from coated rough surfaces. It is found the roughness of coated rough surface can cause partially coherent or noncoherent scattered light even if the incident light source is coherent. It also shows the reflected electromagnetic wave's coherence effect reduces with increased coating thickness and surface roughness, besides the previously recognized incident wave-number bandwidth. The effect of reduce coherence in scattered wave is quantified. Finally a regime map, even limited in the roughness and coating thickness dimensionless parameter ranges, provides the region of validity of the HPCGO model.
    Type of Medium: Online Resource
    ISSN: 0022-1481 , 1528-8943
    URL: Article
    DOI: 10.1115/1.4024466
    Language: English
    Publisher: ASME International
    Publication Date: 2013
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Single-Actuated Camshaft Robot With Multiple Sequential Motions
    ASME International ; 2024
    In:  Journal of Mechanisms and Robotics Vol. 16, No. 6 ( 2024-06-01)
    Details
    In: Journal of Mechanisms and Robotics, ASME International, Vol. 16, No. 6 ( 2024-06-01)
    Abstract: Pipeline inspection in unknown environments is challenging for robots, and various in-pipe crawling robots have been developed in recent years to perform pipeline inspection. Most of these robots comprise multiple parts and require multiple actuators to realize the pipeline locomotion, resulting in complicated system composition and large energy consumption. In this paper, inspired by the crawling principles of earthworm locomotion, we propose a single-actuated camshaft robot that can realize multiple sequential motions for pipeline crawling. The proposed single-actuated camshaft robot contains one actuator and three parts: head anchoring, body elongation, and rear anchoring part. The multiple sequential motions of these three parts are realized based on the cam mechanisms. Umbrella-shaped elastic rubbers are circumferentially around the head and rear anchoring parts. Each part contains a cam bracket. The camshaft’s rotatory motion pushes the cam brackets to generate the axial translational motion, resulting in the umbrella-shaped elastic rubbers being expanded or contracted. The proposed camshaft robot’s expansion and contraction motion are sequentially realized by the phase deviation of the camshafts. First, the structures of the proposed robot are designed. Then, the cam curves are modeled, the expansion/contraction ratio of the rear/head anchoring part is calculated, the phase deviation of the camshafts is determined, and multiple sequential motions of the proposed robot are simulated. Finally, we fabricate the proposed camshaft robot and carry out crawling experiments in pipelines with different shapes and diameters.
    Type of Medium: Online Resource
    ISSN: 1942-4302 , 1942-4310
    URL: Article
    DOI: 10.1115/1.4062987
    Language: English
    Publisher: ASME International
    Publication Date: 2024
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    A Novel Method to Quickly Acquire the Energy Efficiency for Piston Pumps
    ASME International ; 2016
    In:  Journal of Dynamic Systems, Measurement, and Control Vol. 138, No. 10 ( 2016-10-01)
    Details
    In: Journal of Dynamic Systems, Measurement, and Control, ASME International, Vol. 138, No. 10 ( 2016-10-01)
    Abstract: The energy efficiency of the piston pumps is one of the considerable important factors in design and analysis of hydraulic system, especially in the process of real-time tracking of energy dissipation in a variety of loading conditions. The existing methods for obtaining the energy efficiency curve of piston pumps are either time-consuming or inaccurate. In order to quantify the energy efficiency of the piston pumps quickly and accurately, the leakage and friction energy loss caused by the clearances in the sliding pairs are analyzed, and an overall efficiency model was established, which contains two constants to be determined by two test points. The accuracy of the model was verified based on a test rig for a hydraulic pump, and it can be improved by selecting appropriate test points via the method of deviation analysis. The results show that the proposed efficiency models are in good agreement with the experimental results, and the best test points are in the range of 0–25% and 51–75% of the peak pressure of the investigated piston pump.
    Type of Medium: Online Resource
    ISSN: 0022-0434 , 1528-9028
    URL: Article
    DOI: 10.1115/1.4033840
    Language: English
    Publisher: ASME International
    Publication Date: 2016
    detail.hit.zdb_id: 240760-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Improving the Energy Efficiency of a Hydraulic Press Via Variable-Speed Variable-Displacement Pump Unit
    ASME International ; 2018
    In:  Journal of Dynamic Systems, Measurement, and Control Vol. 140, No. 11 ( 2018-11-01)
    Details
    In: Journal of Dynamic Systems, Measurement, and Control, ASME International, Vol. 140, No. 11 ( 2018-11-01)
    Abstract: Hydraulic presses are widely applied in various forming processes to manufacture products with complex shapes, however, they are energy-intensive. In order to lower the energy consumption, a variable-speed variable-displacement pump unit (SVVDP) was developed for hydraulic presses, where the flow rate required by the press in a forming process can be realized by changing the motor rotating speed and the pump displacement simultaneously. A theoretical model was built to reveal the energy dissipation behavior of the drive unit, which shows that the energy efficiency of the drive unit can be optimized by varying the rotating speed of the motor under a variety of load conditions. An experimental platform with a SVVDP was established to find the optimum rotating speed and the corresponding displacement in different load conditions, and experimental results verified the improved energy efficiency of the SVVDP compared with that of the commonly used single variable drive unit. By employing the strategy that the determined optimum rotating speeds in different load conditions were preset as recommended values for the drive unit working in different operations, the proposed drive unit was applied to a press completing a forming process and the results indicate significant energy saving potentials.
    Type of Medium: Online Resource
    ISSN: 0022-0434 , 1528-9028
    URL: Article
    DOI: 10.1115/1.4040325
    Language: English
    Publisher: ASME International
    Publication Date: 2018
    detail.hit.zdb_id: 240760-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Equation Solving DRESOR Method for Radiative Transfer in Three-Dimensional Isotropically Scattering Media
    ASME International ; 2014
    In:  Journal of Heat Transfer Vol. 136, No. 9 ( 2014-09-01)
    Details
    In: Journal of Heat Transfer, ASME International, Vol. 136, No. 9 ( 2014-09-01)
    Abstract: Distributions of ratios of energy scattered or reflected (DRESOR) method is a very efficient tool used to calculate radiative intensity with high directional resolution, which is very useful for inverse analysis. The method is based on the Monte Carlo (MC) method and it can solve radiative problems of great complexity. Unfortunately, it suffers from the drawbacks of the Monte Carlo method, which are large computation time and unavoidable statistical errors. In this work, an equation solving method is applied to calculate DRESOR values instead of using the Monte Carlo sampling in the DRESOR method. The equation solving method obtains very accurate results in much shorter computation time than when using the Monte Carlo method. Radiative intensity with high directional resolution calculated by these two kinds of DRESOR method is compared with that of the reverse Monte Carlo (RMC) method. The equation solving DRESOR (ES-DRESOR) method has better accuracy and much better time efficiency than the Monte Carlo based DRESOR (original DRESOR) method. The ES-DRESOR method shows a distinct advantage for calculating radiative intensity with high directional resolution compared with the reverse Monte Carlo method and the discrete ordinates method (DOM). Heat flux comparisons are also given and the ES-DRESOR method shows very good accuracy.
    Type of Medium: Online Resource
    ISSN: 0022-1481 , 1528-8943
    URL: Article
    DOI: 10.1115/1.4025133
    Language: English
    Publisher: ASME International
    Publication Date: 2014
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Redox Flow Batteries for Energy Storage: A Technology Review
    ASME International ; 2018
    In:  Journal of Electrochemical Energy Conversion and Storage Vol. 15, No. 1 ( 2018-02-01)
    Details
    In: Journal of Electrochemical Energy Conversion and Storage, ASME International, Vol. 15, No. 1 ( 2018-02-01)
    Abstract: The utilization of intermittent renewable energy sources needs low-cost, reliable energy storage systems in the future. Among various electrochemical energy storage systems, redox flow batteries (RFBs) are promising with merits of independent energy storage and power generation capability, localization flexibility, high efficiency, low scaling-up cost, and excellent long charge/discharge cycle life. RFBs typically use metal ions as reacting species. The most exploited types are all-vanadium RFBs (VRFBs). Here, we discuss the core components for the VRFBs, including the development and application of different types of membranes, electrode materials, and stack system. In addition, we introduce the recent progress in the discovery of novel electrolytes, such as redox-active organic compounds, polymers, and organic/inorganic suspensions. Versatile structures, tunable properties, and abundant resources of organic-based electrolytes make them suitable for cost-effective stationary applications. With the active species in solid form, suspension electrolytes are expected to provide enhanced volumetric energy densities.
    Type of Medium: Online Resource
    ISSN: 2381-6872 , 2381-6910
    URL: Article
    DOI: 10.1115/1.4037248
    Language: English
    Publisher: ASME International
    Publication Date: 2018
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...