Measurement of the Pressure Distribution on Two Model Propellers
1982
Jessup, Stuart D.
Experiments are described in which the pressure distribution on two model controllable-pitch propellers was measured. The pressure was measured at 40 locations on the blade surface with the propeller operating in both uniform and inclined flow. The discussion of the experimental technique includes a description of the hardware and data analysis systems. The accuracy of the measured pressures was comparable to the measured calibration accuracy, excluding unexpected loading effects observed on some of the gages. The measured mean pressure distributions produced fair correlation with predictions based on equivalent two-dimensional blade-section methods at the design advance coefficient. The measured pressure coefficients at certain blade locations were observed to be dependent upon Reynolds number for a given advance coefficient. Boundary-layer separation is thought to have caused the Reynolds-number effect. These viscous effects were greater than previously anticipated.
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