Orthogonal Numerical Analysis on Thermal Stress of the Pilot Wearing Anti-G Suit with Phase Change Materials

Abstract:

To investigate heat and moisture transfer mechanisms of the pilots anti-G suit with phase change materials and improve the thermal performance of the garment, a mathematical model for pilot-anti-G suit-environment system is developed. In the model, the coupled heat and moisture transfer and thermal regulation process of phase change materials (PCM) in the anti-G suit are considered, and an 85-node thermal regulatory model is used to simulate human thermal responses. The model is validated by literature experimental data. Then, the parameter effects of PCM on the thermal stress index of the pilot are analyzed based on orthogonal calculation method by utilizing the model. Conclusion shows that the more PCM content and higher latent heat become, the less thermal stress index is.

• Periodical: Advanced Materials Research (Volume 796)
• Pages: 601-606
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.796.601
• Online since: September 2013
• Authors: Feng Zhi Li, Yang Wang, Yi Li
• Keywords: Anti-G Suit, Heat, Moisture Transfer, Phase Change Materials (PCM), Thermal Stress Index

References

[1] Y. F. Qiu, W. Wu, X. G. Yuan, et al, Human thermoregulation model for estamating thermal protection performance of anti-G garments, Chin. J. Mech. Eng. 25 (2012) 47-54.

DOI: 10.3901/cjme.2012.01.047

[2] Y. Li, B. V. Holcombe, A two-stage sorption model of the coupled diffusion of moisture and heat in wool fabrics, Text. Res. J. 62 (1992) 211-217.

DOI: 10.1177/004051759206200405

[3] Y. Li, Z. X. Luo, An improved mathematical simulation of the coupled diffusion of moisture and heat in wool fabric, Text. Res. J. 69 (1999) 760-768.

DOI: 10.1177/004051759906901010

[4] F. Z. Li, Y. Li, Y. X. Liu, et al, Numerical simulation of coupled heat and mass transfer in hygroscopic porous materials considering the influence of atmospheric pressure, Numer. Heat Tr. B-Fund. 45 (2004) 249-262.

DOI: 10.1080/10407790490268814

[5] F. Z. Li, Y. Li, A computational analysis for effects of fiber hygroscopicity on heat and moisture transfer in textiles with PCM microcapsules, Model. Simul. Mater. Sci. Eng. 15 (2007) 223-235.

DOI: 10.1088/0965-0393/15/3/003

[6] F. Z. Li, P. F. Wang, Q. Tu, et al, Numerical simulation for influences of garment with phase change materials on dynamic thermal sensation of human body, J. Nanjing Univ. Aeronaut. & Astronaut. 43 (2011) 262-267.

[7] J. A. J. Stolwijk, J. D. Hardy, Temperature regulation in man - a theoretical study, Pflugers Archiv. 291 (1966) 129-162.

[8] B. W. Jones,Y. Ogawa, Transient interaction between the human and the thermal environment, ASHRAE Trans. l. 88(1992) 189-195.

[9] F. Z. Li, Y. Li, Effect of clothing material on thermal responses of the human body, Model. Simul. Mater. Sci. Eng. 13 (2005) 809-827.

DOI: 10.1088/0965-0393/13/6/002