Flow Studies using Laser Anemometry Technique in aSmall Power Unit Radial Inflow Turbine

[摘要] T-100 is a multipurpose small power unit developed by Sundstrand Power Systems (USA).An extensive research programme was launched for the detailed tests of the rig componentsincluding inlet protection system, Compressor stage, Combustor and the Turbine stage. TurbomachineryGroup at Cranfield was involved in the study of the Turbine unit used in thisprogramme. From the design point of view, detailed aerodynamics in these small units are ofgreat interest especially where high velocities and narrow passages are involved. Experimentalstudy was carried out to investigate the flow in the region between the nozzle guide vanesand the turbine rotor entry. The main concern was to find out how the nozzle guide vane flowwas modified by the rotor and how the rotor flow was affected by the nozzle guide vanes.Laser measurements were taken at these positions for various flow conditions. An other areawhich needs considerable attention is downstream of the turbine rotor where the turning offlow and mixing process make the situation very complicated. Laser studies were undertakenin that region and to gain more confidence on laser results, a Cobra pressure probe wastraversed at these stations. This paper describes various steps undertaken to obtain laserresults within the machine. At the end typical laser results have been presented and discussed.

[学科分类] 力学，机械学