Dynamic total pressure probe

Abstract

The invention discloses a dynamic total pressure probe comprising a kiel rectifier shield, a rigid pressure lead tube, a dynamic pressure sensor, a dynamic pressure sensor support and a half infinite length flexible pressure lead tube; the kiel rectifier shield wraps outside the rigid pressure lead tube so as to collect inflow total pressure in a large angle scope; the rigid pressure lead tube penetrates the dynamic pressure sensor support and is connected with the half infinite length flexible pressure lead tube so as to conduct tested airflow total pressure and adsorb airflow energy after test, thus preventing a test pressure signal to generate reflection interference and resonance effect in the pressure lead pipe; the dynamic pressure sensor is arranged in the dynamic pressure sensor support and connected with a wall surface of the rigid pressure lead tube so as to measure a dynamic pressure signal of the airflow. By employing the dynamic total pressure probe, the kiel rectifier shield enables the signal hole pressure lead tube to test the airflow total pressure in a scope of +-43 degrees of inflow angle; the signal hole pressure lead tube structure can reduce geometry dimension and structure complexity of the probe in a maximum level, thus improving space distinguish capability of the probe for the flow field measurement.

Description

technical field [0001] The invention relates to the technical field of dynamic measurement of flow field in the power electronics industry, in particular to a miniature dynamic total pressure probe used in a large deflection angle range of a gas turbine and a strong three-dimensional flow field. Background technique [0002] Dynamic pressure measurement technology plays an increasingly important role in the experimental research of gas turbines, and the complex internal flow of gas turbines also puts forward high requirements for the design of dynamic pressure measurement systems. Due to the strong unsteadiness and three-dimensionality of the internal flow field of the gas turbine, the complexity of the measurement environment and the limitation of space, the dynamic pressure measurement system must not only have high measurement accuracy and time-space sensitivity, but also have good robustness and maneuverability. The blade sweeping frequency of a gas turbine is generally...

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Problems solved by technology

However, the increase of pressure measuring holes also increases the measurement error and the difficulty of processing and operation of the probe to a certain extent. More importantly, the complex probe structure limits the minimum size of the probe, which is very important for improving the space of the probe. The resolution is very unfavorable, such as the spherical probe five-hole probe developed by Kerrebrockh and Epstein et al., the probe diameter is 5mm; the cylindrical probe four-hole probe developed by them, the diameter of the cylindrical probe is 3.3mm, but four sensors The maximum distance between

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