| Summary: | 碩士 === 淡江大學 === 機械工程研究所 === 73 ===
The atomization and mixing process o fuel and oxdizer are directly influenced by the injector of a combustion chamber. For the purpose of achieving the optimum combustion process, it is important to design the injector which cause the best mixing effect. The purpose of this study is to investigate that influence on liguid propellant mixing for a pair of unlike impinging jets. The influence parameters such as variance in angle of ligued impinging jet, orifice ratio and mixture ratio are considered.
The results of this experimental investigation indicate that the mixing effect in the middle zone is better than that in the two side zones when 2 jets impinge and sprays distribute. For a given constant orifice ratio, though impingement angle is variant, mixing factor tends to decrease when mixture ratio increases. For a small mixture ratio, optimun mixing takes place where the orifice ratio is small; and, for a ladrge mixture ratio, optimun mixing takes place where the orifice ratio is large. From the results of this work, the optimun mixing correlation can be expressed in the from as :〔d2/d1〕Em, max=K〔R2P1/P2〕b where K and b are constants but may be different when impingement angle is different, however, a change of impingement angle does not significantly change the optimum mixing line.
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