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| Estimation of surface heat flux for variable geometry inverse heat conduction problem |
| Received:December 21, 2011 Revised:May 22, 2012 |
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| DOI：10.7511/jslx201302021 |
| KeyWord:inverse heat conduction problem surface heat flux estimation variable geometry Sequential Function Specification Method Conjugate Gradient Method |
| Author | Institution |
| 邵元培 |
空气动力学国家重点实验室,绵阳 |
| 钱炜祺 |
1. 空气动力学国家重点实验室,绵阳 |
| 周宇 |
空气动力学国家重点实验室,绵阳 |
| 杨驰 |
1. 空气动力学国家重点实验室,绵阳 |
| 黄建栋 |
空气动力学国家重点实验室,绵阳 |
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| Abstract: |
| Estimation of surface heat flux for variable geometry heat conduction problem is a special kind of Inverse Heat Conduction Problem(IHCP) and of significant value in engineering practice of surface heat flux inversion for reentry vehicle's ablative thermal protection system.In this paper,the Finite Control Volume(FCV) method used to solve the direct variable geometry heat conduction problem is validated at first and two estimation methods,Sequential Function Specification Method(SFSM) and Conjugate Gradient Method(CGM),are developed for the estimation of the surface heat flux from temperature measurements.The basic idea and detailed algorithm of these two methods are presented and both methods are applied to a typical exemplified case.Two conclusions can be drawn from the result.First,both SFSM and CGM are feasible estimation methods to solve this problem and are not very sensitive to the measurement noise.Second,both estimation methods are suitable for different geometry variation function,but the measurement noise of geometry variation would be directly reflected in the estimation result of surface heat flux. |
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