An eight-hole probe for measuring multi-point total temperature and total pressure in subsonic flow field

Abstract

The invention, which belongs to the technical field of testing of the turbine, discloses an eight-hole probe for measuring a total temperature and a total pressure of multiple points of a subsonic flow field. The eight-hole probe comprises a probe pole 1, a probe head 2, a transition section 3, impulse tubes 4 and a temperature sensor cable 5. The probe pole 1 and the probe head 2 are in cylindrical shapes; and the probe head 2 is connected to the probe pole 1 by the transition section 3. Eight sensing holes are formed in the front end of the cylindrical surface of the probe head 2 and consist of five pressure sensing holes and three temperature sensing holes; the five pressure sensing holes are communicated with five impulse tubes packaged inside the probe head 2; and the three temperature sensing holes are communicated with temperature sensors; and the impulse tubes and the temperature sensor cable are led out of the tail of the probe through a channel inside the probe pole 1. Compared with the existing probe, the eight-hole probe has the following beneficial effects: a flowing speed and a flowing direction of one location point as well as a total temperature and a total pressure of a plurality of location points in a flow field can be measured simultaneously; and the probe is suitable for flow field testing of inlets and outlets and interstage flow field of the subsonic fan, compressor, pump, and draught fan.

Description

technical field [0001] The invention belongs to the field of impeller mechanical testing and testing, and relates to an eight-hole probe for measuring multi-point total temperature and total pressure in a subsonic flow field. Measurement. Background technique [0002] At present, pressure probes and temperature probes are widely used in the measurement of pressure and temperature in the field of turbomachinery, especially in the field of aero-engine flow field testing. Total pressure, static pressure, Mach number, and flow direction can be measured using a pressure probe. The pressure probe cannot measure temperature, so the flow velocity of the flow field cannot be calculated from the data measured by the pressure probe. At present, a separate total temperature probe is usually used to measure the temperature of the incoming flow, and the total temperature probe can measure the total temperature of the incoming flow. [0003] In the existing probe testing technology, for...

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: in view of the problems that the temperature probe and the pressure probe are always used separately in the current turbine test, the test time is long, the cost is high, the operation is complicated, etc., the present invention proposes a subsonic speed probe The multi-point total temperature and total pressure eight-hole probe in the flow field can measure the pressure and temperature at the same time with a single probe, and can simultaneously measure the total temperature, total pressure, flow velocity, flow direction, etc. of multiple points in the flow field flow parameters

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