A steady-state pressure probe using strut blowing to reduce strut blocking effect

Abstract

The invention, which belongs to the technical field of flow field pressure testing, discloses a steady-state pressure probe for reducing a fulcrum bar blocking effect by using air blowing of a fulcrumbar. The steady-state pressure probe is characterized by comprising a probe head, a fulcrum bar, a gas supply pipe and a nozzle; the probe head and the fulcrum bar are welded; and the probe head is connected with an impulse pipe that is packaged inside the fulcrum bar and is connected with the nozzle welded to the fulcrum bar. The nozzle has a cylindrical structure and is welded to the side or top of the fulcrum bar to realize a sealing effect. The fulcrum bar having an enclosed structure facing an incoming flow; a single column or multiple columns of circular holes are formed in the back ofthe fulcrum bar and are connected or communicated with the gas supply pipe. The gas supply pipe is connected with the nozzle welded to the fulcrum bar. A blocking effect caused by the wake of the probe fulcrum bar is reduced by controlling the air blowing quantity of the fulcrum bar. Compared with the existing probe, the steady-state pressure probe has the following beneficial effect: the interference on a tested flow field by an insertion type probe can be reduced by air blowing through the circular holes formed in the surface of the fulcrum bar.

Description

technical field [0001] The invention belongs to the technical field of flow field pressure testing, and relates to a measuring device for a steady state pressure of a flow field, in particular to a steady state pressure probe which utilizes air blowing on a support rod to reduce the clogging effect of a support rod. Background technique [0002] At present, in the internal flow test, such as the measurement of flow field parameters such as the inlet and outlet of compressors, turbines, fans, fans, etc., the direction of airflow between stages, total pressure, static pressure, and velocity, plug-in steady-state pressure is often used. The probe captures the above performance parameters and flow field characteristics. [0003] Since these plug-in pressure probes need to be supported by struts, the struts will interfere with the measured flow field, resulting in flow mixing loss, flow blockage, and even affecting the normal operation of the test piece in severe cases. For exam...

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: when measuring flow field parameters such as airflow direction, total pressure, static pressure, and velocity of the impeller by using the plug-in steady-state pressure probe, the wake of the strut will produce a blocking effect, which will interfere with the measured flow field. Flow characteristics, affecting the measurement of downstream flow field parameters

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