Abstract
The measurement accuracy of a single-point L-type total pressure probe in the inlet stage outlet flow path of a vortex engine compressor and the influence of the probe on the flow field were investigated via numerical simulation. The change pattern of probe measurement results with flow rate under three typical operating conditions of cruise, maximum continuous and takeoff were analyzed, as well as the influence of the installation position on the probe measurement results. The present results show that the measurement error of the probe gradually increases with the increasing of inlet flow rate. The relative measurement error of total probe pressure is the smallest and the measurement error is linear with the flow rate at a ratio(D/d) of 6.5. The relative measurement error of the total probe pressure is greatest when the installation position is located near the leaf basin compared to the leaf back. As the probe is installed closer to the back of the leaf, the total pressure loss coefficient downstream of the probe decreases more slowly and the probe has a greater range of influence on the flow field in the flow direction. When the installation position is located near the leaf basin and leaf back, the velocity uniformity between 5 mm and 24 mm downstream of the probe is smaller.
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