空气动力学和动力学模型对预测旋翼功率的影响

本文介绍了几个不同的空气动力学和动力学模型计算旋翼需用功率的方法,并以SA349/2小羚羊直升机旋翼为算例,进行了不同模型计算结果与飞行试验结果的比较。结果表明,气动模型对预测的旋翼需用功率影响不大,三种组合模型预测的旋翼需用功率与试验结果都吻合得很好,刚性桨叶模型的误差在10％以内,而弹性桨叶模型的误差则可降到5％以下。

THE EFFECT OF ROTOR AERODYNAMIC AND DYNAMIC MODEL ON PREDICTING ROTOR REQUIRED POWER

This paper describes niotheds of predicting rotor required power by several rotor aerodynamic and dynamic model.Comparison is made between predicted results and flight data with SA349/2 helicopter rotor.It shows that the effect of rotor aerodynamic model on predicted rotor required power is unimportant,predicted results with all three compound model are in agressive well with flight data,error of result with blade flapping model is less than 10% and that with flexible balde model is less than 5% .