Browsing by Author "DiPietro, Anthony Louis"
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- Design and experimental evaluation of a dynamic thermal distortion generator for turbomachinery researchDiPietro, Anthony Louis (Virginia Tech, 1993-04-05)This thesis involves the design and experimental evaluation of a dynamic thermal distortion generator for turbomachinery research. The detailed design of a thermal distortion generator, its individual components, and its associated hardware was performed. Details of the preliminary design concepts and also the combustion test cell are discussed. Instruments and controls were developed and installed to regulate the distortion generator’s operation and to obtain data. The complete geometry of the thermal distortion generator and the layout of the combustion test cell was established. Operating and safety procedures were also established. A set of experiments was conducted to confirm the operation of the thermal distortion generator and to obtain experimental data. This data was used to visualize the dynamics of the thermal distortions produced and to show the temperature ramps produced by the generator. This data was used to verify that the distortion generator operated correctly and met all of the design constraints and requirements set forth.
- Effects of temperature transients on the stall and stall recovery aerodynamics of a multi-stage axial flow compressorDiPietro, Anthony Louis (Virginia Tech, 1997-02-05)An experimental investigation into the effects of inlet temperature transients on the stall and stall recovery aerodynamics of a low speed multi-stage axial flow compressor has been presented. Experiments were conducted on a low speed multi-stage axial flow compression system to demonstrate how a compressor dynamically stalls or recovers from a rotating stall operating condition during an inlet temperature transient. The specific effects of the inlet temperature transients on the compressor rotor blade flow physics during the dynamic stall or rotating stall recovery events of the axial flow compression system have been presented. In one experiment, a full recovery from a rotating stall operating condition was successfully accomplished on the low speed multistage axial flow compressor. Explanations for the axial flow compression system dynamic stall and rotating stall recovery processes during inlet temperature transients have been presented. The method utilized for inducing the rotating stall recovery on the compression system has been proposed as a possible new technique for active recovery from rotating stall for single and multi-stage axial flow compression systems.