A Temperature Probe Using Air Blowing on the Rod to Reduce the Blocking Effect of the Rod

Abstract

The invention belongs to the technical field of flow field temperature testing. The invention discloses a temperature probe which utilizes air blowing on a pole to reduce the blockage effect of the pole, which is characterized in that it comprises a probe head, a pole, an air supply pipe, and a nozzle; the probe head and the pole Welding, built-in temperature sensor; the cable of the temperature sensor is packaged inside the pole, leading out from the top or side of the pole, and sealed tightly; the pole is a closed structure, facing the incoming flow, with single or multiple rows on the back A round hole, the hole is connected or communicated with the air supply pipe; the air supply pipe is connected with the joint welded on the pole; the joint is a cylindrical structure, welded on the surface of the pole, and plays a sealing role. By controlling the blowing volume of the support rod, the interference of the inserted probe on the measured flow field can be weakened. Compared with the existing probe, the invention reduces the blockage effect caused by the wake of the probe rod by blowing air through the round hole on the surface of the rod.

Description

technical field [0001] The invention belongs to the technical field of flow field temperature testing, and relates to a flow field temperature measuring device, in particular to a temperature probe which utilizes air blowing on a support rod to reduce the plugging effect of a support rod. Background technique [0002] At present, in the internal flow test, such as the measurement of the inlet, outlet, and interstage airflow static temperature and total temperature of compressors, turbines, fans, fans, etc., plug-in temperature probes are often used to obtain the above performance parameters and flow field characteristics. . [0003] Since the temperature probe needs to be supported by a pole during measurement, the pole will interfere with the measured flow field to a certain extent, resulting in flow mixing loss, flow blockage, and even affecting the normal operation of the test piece in severe cases. For example, when the probe is inserted into the inlet of a small-sized ...

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: when using the plug-in temperature probe to measure the temperature of the flow field in the turbine, the wake of the strut will produce a blocking effect, which will interfere with the flow characteristics of the measured flow field and affect the measurement of downstream flow field parameters

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