喷口形状 meaning in English

nozzle configuration

The ratio of mach number between lateral jet and free flow induce intensity degree of jet interaction . it has no obvious difference between two interactions with two types of nozzle exit configuration , rectangle and ellipse . the shock in front of jet results in increase of shock resistance and the jet ejection causes increase of base resistance
研究表明，侧喷流与来流马赫数之比是影响绕流场的重要因素，该值越大则侧喷干扰越强烈，矩形和椭圆形两种侧喷口形状对侧喷流场干扰波系的影响并不明显。