论文部分内容阅读
针对某发动机高空台试验难以用加装堵板的常规方法测定真空度与次流作用力系数的情况,通过高空舱内冷却空气流动与高空舱内外压差对发动机测力系统作用的分析,介绍了高空舱内真空度和次流对发动机台架测量推力影响的作用机理,并从真空度作用力和次流作用力与发动机总推力的关系出发,经理论推导提出了一种确定真空度与次流作用力系数的新方法。该方法使用限制条件少,试验经济性好,具有较强的工程应用参考价值。
Aeroengine bench test is difficult to install the conventional method of determining the degree of vacuum and the secondary flow force coefficient of the situation, through the cooling air in the upper cabin and the pressure difference between the upper and lower cabin on the engine force measurement system analysis, introduced Based on the relationship between the vacuum force and the secondary flow force and the total thrust of the engine, this paper presents a method to determine the degree of vacuum and A New Method of Secondary Flow Force Coefficient. The method of using less restrictions, test economy is good, with strong reference value of engineering applications.