Calculation of surface heat transfer for a sphere with wall injection

A computational fluid dynamics method is developed to calculate heat transfer rate for a sphere with wall injection in hypersonic how, Attention is paid to exploring the enhanced heat-transfer rate by wall injection. The concept of injection-induced turbulence effect is employed in which the injection how is assumed to be inherently turbulent. A detailed comparison of the calculated heat-transfer distributions with existing experimental data is carried out. Although the quantitative agreement is not yet accomplished for the entire wall surface, the enhanced heat-transfer rate at the stagnation point is well reproduced, and the higher heating rate in the downstream region is indicated in the calculated results.