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  • SAGE Publications  (6)
  • Engineering  (6)
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  • Engineering  (6)
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  • 1
    Online Resource
    Online Resource
    Simulation study on pressure fluctuation characteristics of a high-pressure common rail system
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 237, No. 10-11 ( 2023-09), p. 2645-2663
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, SAGE Publications, Vol. 237, No. 10-11 ( 2023-09), p. 2645-2663
    Abstract: Pressure fluctuations in the high-pressure common rail systems have a significant impact on the fuel injection and engine performance. In this study, the pressure fluctuation in a high-pressure common rail system was investigated using simulations. The fluctuation can be caused by hydraulic structures and control factors. The degree of influence of those two causes was evaluated and discussed in this work. First, the hydraulic and control factors that dominate the models of injection systems were established. Then, the mechanism of pressure fluctuation on high-pressure common rail systems was highlighted. A dimensionless parameter was defined to quantitatively describe the effects of control factors and hydraulic structures on pressure fluctuation. Finally, the developed model was used to study the effects of injection conditions and structural parameters on pressure fluctuation. The results show that the injection frequency has a limited effect on the system pressure fluctuation. In addition, the increase in the injection energizing time and the injection pressure will increase the hydraulic pressure fluctuations of the system, thus increasing the total pressure fluctuations of the system. Moreover, the increase in the volume by increasing the diameter was found to decrease the pressure fluctuations more effectively compared to the impact of the length, but there is a marginal diminishing effect. The results demonstrated that the effect of a 20 bar signal error and a 160 mm common rail length is almost the same on decreasing pressure fluctuations. It can be concluded that the improvements in the electronic part of the high-pressure common rail system have more potential than the mechanical part.
    Type of Medium: Online Resource
    ISSN: 0954-4070 , 2041-2991
    URL: Article
    DOI: 10.1177/09544070221108873
    RVK:
    ZO 4200
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2032754-7
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Polarization selection characteristics of carbon fiber orientation and interweaving for electromagnetic interference shielding behaviors
    SAGE Publications ; 2022
    In:  Textile Research Journal Vol. 92, No. 1-2 ( 2022-01), p. 269-283
    Details
    In: Textile Research Journal, SAGE Publications, Vol. 92, No. 1-2 ( 2022-01), p. 269-283
    Abstract: In this paper, to determine the impact of carbon fiber orientation and interweaving on electromagnetic interference (EMI) shielding behaviors, anisotropic and isotropic samples were developed by conductive/dielectric weaving of spatially distributed carbon fiber and glass fiber. Effortless and cost-effective, the electromagnetic shielding efficiency (SE) was up to 42 dB and the SE/thickness) was 41 dB/mm, which had apparent polarization selection characteristics. In addition, the angle (θ) sensitivity for the SE in transverse electric and transverse magnetic polarization modes was given in detail. SE was generally proportional to θ. Moreover, the fingerprint-like radar chart of anisotropic carbon hybrid woven fabrics in the X-band was performed, which makes polarization selection characteristics more intuitive. This paper presented an easy and effective route for assembling hybrid carbon fiber fabrics with high EMI shielding performance, which offers a clear perspective on the simulation and study of carbon fiber electromagnetic properties.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/00405175211034248
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2209596-2
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  • 3
    Online Resource
    Online Resource
    Fuzzy-integrative judgment on the end-use performance of knitted fabrics made with polytrimethylene terephthalate blended yarns
    SAGE Publications ; 2011
    In:  Textile Research Journal Vol. 81, No. 17 ( 2011-10), p. 1739-1747
    Details
    In: Textile Research Journal, SAGE Publications, Vol. 81, No. 17 ( 2011-10), p. 1739-1747
    Abstract: Polytrimethylene terephthalate (PTT) fiber is a new kind of synthetic fiber that has outstanding thermal, chemical, and mechanical properties and has widely been used in leisure wear, underwear, sportswear, and other textile products in the recent years. In this study, five different PTT blended yarns were used for the development of weft knitted fabrics for sweaters, which are traditionally produced with wool and acrylic fiber yarns. Three fuzzy-integrative judgment methods, that is, the fuzzy Borda method, osculating value method, and fuzzy clustering analysis, were used to evaluate the end-use performance of these fabrics. The results have shown that the fuzzy-integrative judgment is an effective way for the evaluation of this kind of fabric product and that the fabrics with the best end-use performance among the five fabrics developed are those knitted with PTT/wool/Tencel and PTT/bamboo blended yarns. These results can be used to help knitting companies for the development of new products using PTT material.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/0040517511410103
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2011
    detail.hit.zdb_id: 2209596-2
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  • 4
    Online Resource
    Online Resource
    Evaluation of calcium oxalate deposition on different fabrics under different sodium oxalate-based detergent formulations
    SAGE Publications ; 2020
    In:  Textile Research Journal Vol. 90, No. 23-24 ( 2020-12), p. 2613-2621
    Details
    In: Textile Research Journal, SAGE Publications, Vol. 90, No. 23-24 ( 2020-12), p. 2613-2621
    Abstract: The builder is an important ingredient in detergents. Sodium oxalate is a good non-phosphate detergent builder, which has good calcium-removing properties and good wash performance in detergents. However, sodium oxalate-based detergent formulations face a tricky problem of “incrustation” on fabrics due to calcium oxalate deposition. If sodium oxalate is used in commercial detergents, then “incrustation” must be solved. In this study, we examined the effect of fabric type, anionic surfactant, polymer, and temperature on incrustation and soil redeposition (“secondary” washing effect) of a sodium oxalate-based detergent. The results showed that both the anionic surfactant and polymer influenced the deposition of calcium oxalate on fabrics. Overall, the amount of calcium oxalate deposition followed the order polyamide  〈  polyester  〈  cotton with the same formulation. Finally, good secondary washing effects (low ash deposition and high whiteness retention) formulations were selected by cumulative washing. The formulation of methyl ester sulfonate (MES)-sodium carboxymethyl cellulose (CMC), MES-polyvinyl pyrrolidone, and alcohol ether sulfate (AES)-CMC had better secondary effects, and the optimal combination of the 12 formulations was AES-CMC.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/0040517520933699
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2209596-2
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  • 5
    Online Resource
    Online Resource
    Influence of incident energy on the properties of arc rated para-aramid fabric
    SAGE Publications ; 2021
    In:  Textile Research Journal Vol. 91, No. 21-22 ( 2021-11), p. 2500-2507
    Details
    In: Textile Research Journal, SAGE Publications, Vol. 91, No. 21-22 ( 2021-11), p. 2500-2507
    Abstract: To study the protection mechanism of para-aramid fabrics under an electric arc, the structural composition, surface morphology, and thermal properties of an untreated para-aramid fabric and that treated with different incident energy arcs were compared. The intensity of the N-H peak of the para-aramid cellulose amide decreased with increasing exposed arc energy. Moreover, intensities of the C=O peak of the amide bond type I carbonyl and the C-H deformation vibration absorption peak originating from the benzene ring gradually weakened. In contrast, the carbon content of the fabric increased. In the arc deflagration process, the fiber broke and then carbonized and embrittled. With an arc energy of 30.9 cal/cm 2 , the carbonization degree of the front surface of the fabric increased and was highest at the float line. The initial combustion temperature remained unchanged, and the mass residual quantity gradually increased with increasing arc energy exposed to the fabric. The above results suggest that para-aramid fabric can protect the end user in an arc by carbonization, offering effective assistance in the research and development of personal protective equipment for arc flashes.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/00405175211010679
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2209596-2
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  • 6
    Online Resource
    Online Resource
    All-knitted stretchable dipole antenna: design, fabrication, and effects of yarn alignments on antenna electromagnetic and tensile properties
    SAGE Publications ; 2023
    In:  Textile Research Journal
    Details
    In: Textile Research Journal, SAGE Publications
    Abstract: With the evolution of the Internet of Things, stretchable antennas are playing an increasingly important role in wearable devices and flexible electronics. Typical drawbacks of current stretchable antennas are complex manufacturing processes, inadequate ventilation, and limited flexibility, which negatively impact their comfort and practicality. In this study, an all-knitted stretchable dipole antenna was designed and fabricated. This antenna was breathable and flexible like regular knitted fabric and had a simple manufacturing process. In addition, the effects of two yarn alignment types, namely antenna arms aligned in the course (AaC) and wale (AaW) directions, on antenna electromagnetic properties under tensile stress were investigated. Under unstretched conditions, both antenna AaC and AaW exhibited S 11 of less than –10 dB at the operating frequency of 915 MHz, demonstrating good impedance matching performance and omnidirectional radiation characteristics. When stretched along the arm length direction, the frequency variations and strain of antenna AaC and AaW displayed strong linear relationships. Specifically, antenna AaC exhibited a higher sensitivity to the resonant frequency variation induced by strain when compared to antenna AaW. The results suggest that the antenna AaC are a more desirable option to be used as a sensor for human body movement monitoring. This study provides the theoretical basis and experimental foundation for the design and large-scale production of stretchable antennas utilizing textile materials.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/00405175231199258
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2209596-2
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