1前言一个多世纪以来,水力测功器一直是测量和诊断发动机性能的重要设备。由于较诸电力与气动机械具有若干固有优点(如单位造价较低,尺寸紧凑,惯性小,快速瞬态响应以及在高转速和大功率工况下的运行能力),水力测功器已经成为航空及工业用和船用燃气轮机发动机进行研制、耐久性 1 Introduction For more than a century, hydro-dynamometers have been an important device for measuring and diagnosing engine performance. Hydrodynamic dynamometers have become aeronautic as they have several inherent advantages over both electric and pneumatic machines (such as lower unit cost, compact size, less inertia, fast transient response, and operational capability at high rotational speeds and high power conditions) And industrial and marine gas turbine engine development, durability