Total temperature leaf type probe

Total temperature leaf type probe

  • CN 106,918,410 B
  • Filed: 03/29/2017
  • Issued: 11/17/2020
  • Est. Priority Date: 03/29/2017
  • Status: Active Grant
First Claim
Patent Images

1. A total warm leaf type probe which is characterized in that:

  • comprises a stagnation cover (1), a lead (2), a blade (3), a heat insulation ring (4) and a temperature sensor (5);

    each blade (3) is provided with at least 5 measuring points, the stagnation cover (1) and the temperature sensor (5) are fixed near the front edge of the blade (3), the axial direction of the stagnation cover (1) faces to the expected incoming flow direction, the head of the temperature sensor (5) is sleeved with a heat insulation ring (4), the left side and the right side of the stagnation cover (1) are symmetrically provided with two outflow holes (6), and the lead (2) is fixed on the surface of the blade (3) or in the blade (3) and led out from the root of the blade (3);

    the outer diameter of the stagnation cover (1) is 2 mm to 6 mm, the inner diameter is 1 mm to 5 mm, and the length of the stagnation cover (1) is 3 mm to 10 mm;

    the inner circle of the head part of the stagnation cover (1) is provided with a chamfer angle, the chamfer angle ranges from 15 degrees to 75 degrees, and the left side and the right side of the position 2 mm to 6 mm away from the head part of the stagnation cover (1) are provided with outflow holes (6) with the diameters of 0.5 mm to 1 mm;

    the diameter of the lead (2) is 0.5 mm to 3 mm, and the lead (2) can be fixed on the blade (3) or embedded in the blade (3) for fixing;

    the material of the heat insulation ring (4) can be ceramic or rubber, or other heat insulation materials;

    the temperature sensor (5) can be a thermocouple, a thermal resistor or other temperature sensing elements;

    the stagnation cover (1) can be arranged on the pressure surface side of the blade (3), can be arranged on the suction surface side of the blade (3) or is embedded into the front edge of the blade (3);

    a plurality of total temperature measuring points can be arranged on the blade (3), at least 5 total temperature measuring points are arranged on the blade, and the blade is generally dense at two ends and sparse in the middle;

    the axial directions of the stagnation cover (1) are different, and the stagnation cover respectively faces to the expected incoming flow direction at the respective spatial positions;

    the probe can reduce the total temperature measurement error of the probe, can also measure the total temperature in the boundary layer of the rotor outlet or the interstage end wall, can accurately measure the distribution of the interstage total temperature along the spanwise direction of the blade through calibration, can accurately and comprehensively measure the total temperature distribution of the rotor outlet or the interstage, and improves the measurement precision of total temperature data;

    the probe has small interference on a measured flow field, and is more suitable for measuring the total temperature distribution of the rotor outlet under the condition that the axial clearance between the rotor and the stator of the turbine is only a few millimeters.

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