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螺旋桨拉力是螺旋桨的主要性能指标之一。工程技术领域提出了很多方法得到螺旋桨实际工作过程中的拉力,但这些方法只能在地面上予以实施,不能实测实际飞行过程中螺旋桨的拉力。在某型螺旋桨发动机的试飞过程中,尝试通过实测发动机承力杆系的应变来计算螺旋桨拉力。尽管这种方法由于发动机工作过程中主撑杆弹性变形很小,且实际飞行过程中受力复杂,所得结果与实际预期有一定差异,但该方法对CFD计算模型的修正以及实际飞行结果反证仍具有一定的参考意义。
Propeller pull is one of the main performance indicators of the propeller. Many methods have been proposed in the field of engineering technology to obtain the pulling force during the actual operation of the propeller. However, these methods can only be implemented on the ground and the actual pulling force of the propeller can not be measured. During the test flight of a propeller engine, try to calculate the propeller pull by measuring the strain of the bearing system of the engine. Although this method has little difference between the elastic deformation of the main brace during engine operation and the actual force during the actual flight, the obtained results are different from the actual expectations. However, the correction of the CFD calculation model and the actual flight results are still valid Has a certain reference value.