THERMAL ANALYSIS OF AN OCTAGONAL SHELL EARTH ORBITING BODY

محتوى المقالة الرئيسي

Khalil M. Khalil
Manhal M. Awda
Ihsan Y. Hussain

الملخص

The thermal behavior of an octagonal shell orbiting body in space environments had been simulated theoretically in the present work, and a simplified experimental test in a thermal vacuum chamber was also made on half-scale model of the prototype to investigate the problem. A mathematical model was built and simulated numerically by using lumped system technique and finite difference control volsme approach with explicit scheme. The body in its orbit around the earth is assumed to receive solar, albedo and earth radiation heat fluxes. The orbit is circular of (500-Km) height and (40) inclination. The developed computational algorithm is capable of calculating the heat fluxes on body faces and the temperature distribution of the body at any time instant. The results showed that the albedo and earth heat fluxes are smaller when the orbit is higher. In the side faces, the heat fluxes are maximum when orbit inclination is minimum, and vice versa, the inverse behavior is true for the upper and lower faces. The heat fluxes are maximum in winter solstice and minimum in summer solstice. If the difference between the emissivity and absorptivity values is low, the body reaches to synchronous steady state faster. The emissivity is affected more than absorptivity. The temperatures of faces, which see the carth, are more fluctuated than the other faces. Comparison between theoretical and experimental results showed good agreement.

تفاصيل المقالة

كيفية الاقتباس
"THERMAL ANALYSIS OF AN OCTAGONAL SHELL EARTH ORBITING BODY" (2005) مجلة الهندسة, 11(01), ص 175–192. doi:10.31026/j.eng.2005.01.16.
القسم
Articles

كيفية الاقتباس

"THERMAL ANALYSIS OF AN OCTAGONAL SHELL EARTH ORBITING BODY" (2005) مجلة الهندسة, 11(01), ص 175–192. doi:10.31026/j.eng.2005.01.16.

تواريخ المنشور

المراجع

Awda, M. M. and Petrovic, Z. (2000), Thermal Distribution of Non Rectangular Regions Using Finite Difference Method.

Beckman and John A. Duffie. 1974), Solar Energy Thermal Processes, Wiley- Interscience Publication, John Wiley & 3uns New York.

Daniel Coyl ( 2001), The Spartnik Thermal Control System, San Jose State University, Mechanical and Aerospace Engineering Department one Washington square San Jose, CA 95192-0087

Jeong-Soo Kim & Young-Keun Chang (1999), Absorbed Heat-Flux Method for Ground Simulation of on-Orbit Thermal Environment of Satellite, J. Astron. Space Sci. 16(2), 177 190.

Kreith. F.(1962), Radiation Heat Transfer For Spacecraft And Solar Power Plant Design International Textbook Company, Scranton, Pennsylvania.

Krishnaprakas, C. K. (1998), A Comparison of ODE Solution Methods for Spacecraft Thermal Problems. Hemisphere Publ Corp, 1900 Frost Road, Suite 101, Bristol, PA 19007-1598, USA.

Mosao A. 1984), New Method of Thermal Network Modeling A Nonlinear Programming Approach. Publ by AGNE Publ. Inc.. Japan.

Roos, D. & Diner. A. (2002), Thermal Design Analysis of A Satellite with Articulating Solar Panels, Internet Document.

Siegel R. and Howell, R.(1972), Thermal Radiation Heat Transfer, McGraw-Hill Book Company, New York

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