变比热平行混合近似解

AN APPROXIMATE SOLUTION FOR VARYING SPECIFIC HEAT PARALLEL STREAM MIXING

关键词:  无粘流  气动热力学  计算流体动力学  比热

Key words:  Inviscid flow  Aerothermodynamics  Computational fluid dynamics  Specific heat

摘要:

平行混合变比热改进解析解，合理、简明、快捷，定比热解误差大。在准确的改进解与定比热解之间，探索了几种简化的近似解，从中看出，冷、热、混三气各简化按其自身静温比热比ｋ＿Ｔ作计算的近似解，结果总的误差较小，可供参照取用。算例包括不等总压及等总压混合，并对等总压混合后总压降低作出初步分析。

Abstract:

The author has already put forward an improved analytical solution for varying specific heat parallel stream mixing, which is more rational,simpler,quicker and hence more advanced. And it is understand that fixed specific heat solution gives big errors. This paper is aimed at searching for some simplified approximate solutions between the former two. It is clear now that the method using only specific heat rations kT for cold, hot and mixed streams static temperatures gives nearest to accurate results, so could be adopted for reference and applications. Illustrative examples include mixing of unequal and equal total pressures, with the drop of total pressure after mixing in the latter case primarily analyzed.