Solution for laminar compressible axisymmetric jets issuing into stagnant and moving mediums

Abstract EN

A numerical study is conducted for laminar compressible axisym- metric jets.

The outer medium into which the jet is injected is considered to be at rest or moving parallel to the jet.

Two values of the outer medium velocity are investigated while four types of the injected gas are considered, namely carbon dioxide, oxygen, ammonia and hydrogen.

An implicit finite difference method is used to solve the boundary layer equations governing the jet flow.

A coordinate transformation is used to improve the efficiency and accuracy of the numerical scheme.

Results for the velocity profiles and mixture fraction profiles are obtained.

An analysis of these results is made and a criterion for comparing the velocity and mixture fraction decay rates for the considered gases is established.