3次元CFDソルバ／節点法熱解析コードによる連成解析システムの開発

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  • New compact coupling analyses system with 3-D CFD solver & thermal analyzer with nodal method

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The CFD and thermal coupling analyses system had been developed which software configuration was very compact to need less computational resource named CCAS (Compact Coupling Analyses System). A nodal method was applied for the thermal analyzer in the system because it essentially needed less memory resources and computation time, while a finite element method is generally used in other coupling analyses system. Also a set of assistance software was made that semi-automatically produced a thermal mathematical model from a CFD model to make a series of analyses work more efficient. A test analysis was done around H-2A 4S fairing during a flight. Heat flux at the stagnation point was compared with the value derived from theoretical equations, and analysis value was about 20 percent higher than from theoretical equations. Also compared were temperatures in the faring body with values of actual measurement at the first flight, and these from analysis were a little higher than actual. Although these calculation results of heat flux and temperatures from analysis indicated higher values, its differences were not so significant and were thought to be in the range of error by modeling uncertainty so the results from analysis were relatively correct and the system was confirmed to be valid.

資料番号: AA0045948018

レポート番号: NAL SP-57

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