Combined dynamic probe with temperature correction function and capable of measuring total pressure and speed of fluid

Abstract

The invention belongs to the technical field of pressure and speed test and discloses a combined dynamic probe which has a temperature correction function and can measure total pressure and speed of a fluid. The probe contains a probe head and a strut (1), wherein the probe head contains a hot wire (5), a hot wire support (4), a pressure hole (2) and a temperature sensor (3); the hot wire (5) is welded on the hot wire support (4); the pressure sensor is mounted at a position, close to the pressure hole (2), inside the probe head, and axis of a pressure sensor mounting hole (2) is vertical to the hot wire (5). A mounting hole for the temperature sensor (3) is formed at the central position of a mounting surface of the hot wire support (4). Compared with an existing pressure probe and an existing temperature probe, after being calibrated, the combined dynamic probe can measure dynamic parameters such as turbulivity and total pressure of an incoming flow at the same time, also can correct influence of temperature on a hot wire measuring result and is applicable to measurement of dynamic total pressure and turbulivity of a turbine inlet.

Description

technical field [0001] The invention belongs to the technical field of pressure and speed testing, and relates to a combined dynamic probe with temperature correction for measuring the total pressure and speed of a fluid. The invention can measure the total pressure and speed parameters of the fluid at the same time. The probe not only reduces the influence of the probe on the flow field, but also performs temperature correction on the measurement results of the hot wire, thereby improving the accuracy of the measurement results. Background technique [0002] The measurement of total pressure and turbulence is an important part of the measurement of turbine inlet parameters. The flow field at the inlet of the turbine can be regarded as a one-dimensional flow field under the condition of uniform air intake, so the single-hole needle is often used to measure the total pressure at the inlet of the turbine, and the hot wire probe is often used in the measurement of turbulence du...

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is: in view of the lack of current scientific research and engineering application testing technology that can simultaneously obtain flow field velocity and pressure information, has little influence on the measured flow field, and can perform temperature correction on hot-line measurement results

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