primary nozzle

The results have an important reference value for selecting primary nozzle types of exhaust ejector systems.

试验结果对排气引射系统主喷管选型设计有重要的参考价值.

The hot fire and cold flow experiments of two kinds of test plug nozzle engines were done to know more about the influence of plug nozzle performance by changing the angle of the primary nozzle.

为分析主喷管角度对塞式喷管性能的影响，对两种塞式喷管实验发动机进行了热试和冷流试验。

By using the rotor wing experimental equipment, experimental investigation about the influent factors on nozzle jet reacting force is carried on, and the validity of the primary evaluating method for rotor wing aerodynamic performance is verified furthermore.

利用旋转机翼地面试验装置开展了喷口喷气反作用力影响因素的试验研究，并进一步验证了旋转机翼垂直飞行基本气动性能的初步估算方法的有效性。