Rotating shaft balance for measurement of total propeller force and moment

International Congress on Instrumentation in Aerospace Simulation Facilities, Pub Date : 1993-09-20 DOI:10.1109/ICIASF.1993.687650

L.G.M. Custers, A.H.W. Hoeijmakers, A. Harris

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引用次数: 2

Abstract

At NLR a six-component rotating shafl balance has been developed. The rotating shaft balance (RSB) is intended for use during propeller forces measurements, both installed and isolated testing. By using an RSB it is possible to determine the propeller wing interference effects on the propeller as well as on the wing. The development work included the design of the RSB, the creation of a suitable dynamic data acquisition system and a series of proving trials. An Fast Fourier Transform (FFT) system has been used to support the determination of the off-axis components of the forces and moments. During these trials the RSB was calibrated statically on all components and dynamically on thrust and torque. In addition propeller performance measurements have been wormed to acquire operational experience and to determine the influence of oblique inflow into the propeller plane. Both the proving trials and the performance measurements have been performed in the NLR closed circuit Low Speed wind Tunnel (UT). The RSB was mounted on an isolated propeller rig which has been used in previous wind tunnel tests. An extensively tested one fifth scale Fokker 50 model propeller has been used, thus a subslantid performance database and experience of the rig was already available. Trials showed that an accuracy of 0.2 96 on torque and 0.3 % full scale on thrust was rea l id . Results of the propeller performance test indicated an accuracy for the off-axis components of 1.5 % and 1.8 % for ESP. the off-axis moment and force. The tria Is and isolated propeller tests have given confidence in the RSB design, manufacturing and testing capabilities and a design and production approach is now defined. It is planned to use the existing RSB in conjunction with an extemal six-component balance in an installed propeller half model test. With the availability of the RSB it is now possible to close the accounting scheme in determination of propellerlwing interaction forces and moments . ' J =

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用于测量总螺旋桨力和力矩的转轴天平

在NLR研制了六分量旋转轴平衡器。旋转轴平衡(RSB)用于螺旋桨力测量，包括安装和隔离测试。通过使用RSB，可以确定螺旋桨机翼的干扰对螺旋桨以及机翼的影响。发展工作包括设计RSB，建立一个合适的动态数据采集系统和一系列的验证试验。快速傅立叶变换(FFT)系统用于支持力和矩的离轴分量的确定。在这些试验中，RSB对所有组件进行了静态校准，并对推力和扭矩进行了动态校准。此外，还对螺旋桨性能进行了测试，以获得操作经验，并确定斜流进入螺旋桨平面的影响。在NLR闭环低速风洞(UT)上进行了验证试验和性能测试。RSB安装在一个孤立的螺旋桨钻机上，该钻机曾在以前的风洞试验中使用过。使用了经过广泛测试的五分之一比例的Fokker 50模型螺旋桨，因此已经有了大量的性能数据库和钻机的经验。试验表明，该方法的扭矩精度为0.2 - 96，推力精度为0.3%。螺旋桨性能试验结果表明，离轴力矩和离轴力的精度分别为1.5%和1.8%。试验和隔离螺旋桨试验为RSB的设计、制造和测试能力提供了信心，并确定了设计和生产方法。计划在已安装的螺旋桨半模型试验中，将现有的RSB与外部六分量平衡结合使用。随着RSB的可用性，现在有可能关闭计算方案，以确定螺旋桨翼相互作用力和力矩。”J =

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International Congress on Instrumentation in Aerospace Simulation Facilities,

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