Performance of a Rotatable Cylinder Pitot Probe in High Subsonic Non-ideal Gas Flows

The performance of a rotatable Pitot cylinder probe was experimentally investigated in the calibration test section of a closed loop organic vapor wind tunnel with the working fluid Novec™ 649 at elevated density level. Subsonic up to high subsonic flow conditions (M = 0.5 – 0.7) were covered by the experiments. The data reduction process for obtaining Mach numbers and velocity based on non-ideal flow calculations and corresponding isentropic relations were reviewed. The theoretical results were compared with experimental data. It was found that in the case of high subsonic non-ideal gas flows, significant deviations in comparison with conventional perfect gas flows occurred.