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  • SAGE Publications  (6)
  • 1
    Online Resource
    Online Resource
    Multi-point micro-flame ignited hybrid lean-burn combustion of gasoline with direct injection dimethyl ether
    SAGE Publications ; 2021
    In:  International Journal of Engine Research Vol. 22, No. 1 ( 2021-01), p. 140-151
    Details
    In: International Journal of Engine Research, SAGE Publications, Vol. 22, No. 1 ( 2021-01), p. 140-151
    Abstract: Lean-burn combustion is effective in reducing fuel consumption of gasoline engines because of the higher specific heat ratio of the fuel lean mixture and reduced heat loss from lower combustion temperature. However, its application to real engines is hampered by the unstable ignition, high cyclic variability, and partial-burn due to slower combustion, as well as the restricted maximum lean-burn air/fuel ratio limit and the insufficiently low nitrogen oxides emission. Multi-point micro-flame-ignited hybrid combustion has been proposed and applied to extend the lean burn limit of premixed gasoline and air mixture. To achieve micro-flame-ignited combustion in premixed lean gasoline mixture formed by port fuel injection, a small amount of dimethyl ether is injected directly into the cylinder of a four-stroke gasoline engine to control and accelerate the ignition and combustion process so that the engine could be operated with the overall excess air coefficient (Lambda) of 1.9. The results show that heat release processes can be grouped into three forms, that is, ramp type, double-peak type, and trapezoid type. Regardless of single or split injections, direct injection timing of dimethyl ether dominates the features of heat release. The ramp type occurs at early injection timing while the double-peak type takes place at late injection timing. Trapezoid type appears between the above two types. Dimethyl ether injection timing controls the ignition timing and has less effect on combustion duration. Single injection of dimethyl ether leads to much earlier ignition timing and slightly longer combustion duration, forming higher nitrogen oxides emissions than the split injections. Ultra-low nitrogen oxides emissions and higher thermal efficiency are achieved in the ramp type combustion compared to the other two types of combustion in both injection approaches.
    Type of Medium: Online Resource
    ISSN: 1468-0874 , 2041-3149
    URL: Article
    DOI: 10.1177/1468087419840469
    RVK:
    ZG 1100
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2030603-9
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Research on a simulating device for electric transmission characteristics of long-distance subsea umbilical cable
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Vol. 235, No. 1 ( 2021-02), p. 255-263
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, SAGE Publications, Vol. 235, No. 1 ( 2021-02), p. 255-263
    Abstract: Subsea umbilical cable is an important link to transmit power and signals in subsea production system, often lasts for tens of kilometers in deep-sea projects. It is expensive, bulky, and inconvenient to transport. In this article, a compact, low-cost umbilical cable electrical simulator is proposed, which can be equivalent to the real umbilical cable in power transmission characteristics and can adjust parameters in a certain range. By studying the electrical transmission characteristics of long umbilical cable, the calculation method of electrical transmission characteristics is determined. A simulation device for simulating the transmission characteristics of umbilical cable is designed, which can be used to simulate the umbilical cable diameter of 10 and 16 mm 2 . The voltage drop characteristics, signal transmission attenuation characteristics, and power carrier characteristics of the umbilical cable electrical simulation device are simulated and experimentally analyzed. The experimental results show that the voltage drop characteristics, signal transmission attenuation characteristics, and power carrier characteristics of the umbilical cable electrical simulator are in good agreement with the real umbilical cable. The simulation device of umbilical cable can well simulate the power and signal transmission characteristics of real umbilical cable.
    Type of Medium: Online Resource
    ISSN: 1475-0902 , 2041-3084
    URL: Article
    DOI: 10.1177/1475090220924503
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2089895-2
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  • 3
    Online Resource
    Online Resource
    Tensile Properties of Epoxy with Microcapsules and Imidazoline Derivatives Curing Agent and Interlaminar Self-Healing Properties of Carbon Fiber Reinforced Epoxy Composites
    SAGE Publications ; 2014
    In:  Polymers and Polymer Composites Vol. 22, No. 3 ( 2014-03), p. 293-298
    Details
    In: Polymers and Polymer Composites, SAGE Publications, Vol. 22, No. 3 ( 2014-03), p. 293-298
    Abstract: Microcapsules are inevitable defects in the resin matrix, which would greatly influence on mechanical performance of structural material. Therefore, a balance value of microcapsule's content between self-healing properties and mechanical properties should be provided for fabricating adequate self-healing materials. Epoxy resin with epoxy-containing microcapsules and latent hardener 2MZ-AZINE, and carbon fiber reinforced epoxy composites were prepared. The tensile properties of epoxy resin with epoxy-containing microcapsules or 2MZ-AZINE were investigated. As the increase of content of latent hardener 2MZ-AZINE, tensile modulus and tensile stress of epoxy with 2MZ-AZINE decreases. The tensile stress of epoxy samples decreases with the enhancement of content of epoxy-containing microcapsules. Tensile modulus of epoxy with microcapsules decreases with the increase of microcapsule content below 10 wt.%, and tensile modulus increases above 10 wt.%. Considering the self-healing ability of epoxy sample, the content of microcapsules and latent hardener are concluded to 15 w% and 2 w%, respectively, offering a ∼24.7 MPa tensile stress. The maximum interlaminar self-healing efficiency in this research is only 31.98% recovery of interlaminar tensile stress (epoxy resin matrix with 15 w% microcapsule and 2 w% latent hardener 2MZ-AZINE). As a consequence, this research provided the mechanical parameter for fabricating carbon fiber reinforced epoxy composite.
    Type of Medium: Online Resource
    ISSN: 0967-3911 , 1478-2391
    URL: Article
    DOI: 10.1177/096739111402200311
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2099644-5
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  • 4
    Online Resource
    Online Resource
    A Multiple-Dimensional Tree Routing Protocol for Multisink Wireless Sensor Networks Based on Ant Colony Optimization
    SAGE Publications ; 2012
    In:  International Journal of Distributed Sensor Networks Vol. 8, No. 11 ( 2012-11-04), p. 397961-
    Details
    In: International Journal of Distributed Sensor Networks, SAGE Publications, Vol. 8, No. 11 ( 2012-11-04), p. 397961-
    Type of Medium: Online Resource
    ISSN: 1550-1477 , 1550-1477
    URL: Article
    DOI: 10.1155/2012/397961
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2012
    detail.hit.zdb_id: 2192922-1
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  • 5
    Online Resource
    Online Resource
    Numerical simulation of the mooring capacity comparison of the subsea suspended manifold with two mooring schemes
    SAGE Publications ; 2022
    In:  Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Vol. 236, No. 3 ( 2022-08), p. 616-629
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, SAGE Publications, Vol. 236, No. 3 ( 2022-08), p. 616-629
    Abstract: The next-generation underwater production system (NUPS) is based on the suspension cluster manifold (SCM) as a new conceptual scheme. SCM mooring stability is essential for establishing NUPS. Therefore, comparing the SCM mooring stability in different mooring systems is vital for evaluating system adaptability. This paper detailed two mooring schemes designed for the SCM, including the steel catenary riser (SCR) mooring system and the new steep wave (NSWR) mooring system. OrcaFlex software was used to establish the mooring system model, analyzing the static motion response of the SCM under the current and fluid density. Furthermore, the mooring system adaptability in the cluster wellhead layout was also evaluated and compared. The results showed that the maximum offset of the SCM with the SCR mooring system was within 2 m under the current, while the deflection of the SCM with the NSWR mooring system was within 1.5° in extreme fluid densities. Furthermore, the SCM with the SCR mooring system displayed superior station-keeping capability in the current, while the NSWR mooring system exhibited better stability when transporting extreme fluid densities and was more adaptable in cluster wellhead layouts.
    Type of Medium: Online Resource
    ISSN: 1475-0902 , 2041-3084
    URL: Article
    DOI: 10.1177/14750902211070105
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2089895-2
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  • 6
    Online Resource
    Online Resource
    Activation of RAW264.7 cells by PCp-I, a polysaccharide from Psoralea corylifolia L, through NF- κ B/MAPK signalling pathway
    SAGE Publications ; 2021
    In:  International Journal of Immunopathology and Pharmacology Vol. 35 ( 2021-01), p. 205873842110100-
    Details
    In: International Journal of Immunopathology and Pharmacology, SAGE Publications, Vol. 35 ( 2021-01), p. 205873842110100-
    Abstract: PCp-I is a polysaccharide isolated and identified from the Psoralea corylifolia L. by our research group. In this study, the immunomodulatory effects of PCp-I on RAW264.7 cells was evaluated. PCp-I could enhance the level of NO along with up-regulation of iNOS mRNA in RAW264.7 cells. The PCp-I could significantly up-regulate the mRNA expression of TNF- α and IL-6 in RAW264.7 cells, and then the expression of TNF- α, IL-6, ROS and the phagocytic activity were increased. Additionally, PCp-I could significantly up-regulate the phosphorylation level of p65, p38, ERK and JNK proteins, which proved that PCp-I could activate the macrophages by MAPKs and NF- κB signalling pathway and the TLR4 may be one of the receptors of PCp-I regulate the RAW264.7 cells.
    Type of Medium: Online Resource
    ISSN: 2058-7384 , 2058-7384
    URL: Article
    DOI: 10.1177/20587384211010058
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2505963-4
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