粘性损失 meaning in English

viscous loss

Then , the one dimensional model is used to study on some factors ( viscosity , the heat given out by the chemical reaction in the chemical laser ) which bring the loss of the total pressure . the answer shows that increasing the mach number at out of the nozzles in the laser can reduce the loss of the total pressure
在此基础上,用简化的一维模型研究了引起激光器总压损失的几个要素,它们是:喷管的粘性损失,光腔内的放热化学反应。研究的结果表明,提高喷管出口马赫数有利于减少这些因素导致的总压损失。