CN106950003A - A kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field - Google Patents

A kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field Download PDF

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CN106950003A
CN106950003A CN201710115438.8A CN201710115438A CN106950003A CN 106950003 A CN106950003 A CN 106950003A CN 201710115438 A CN201710115438 A CN 201710115438A CN 106950003 A CN106950003 A CN 106950003A
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probe
dynamic pressure
dimensional flow
flow field
pressure
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CN106950003B (en
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马宏伟
马融
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Beihang University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels

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  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The invention belongs to pressure test technical field, disclose a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field, including end of probe, pole, end of probe includes the cylinder of bottom surface, cone altogether, one dynamic pressure transducer of its enclosed inside, in probe circular cone body side surface, is provided with a pressure experience hole, the hole is connected with the dynamic pressure transducer in end of probe, and sensor wire draws probe tails by probe pole internal channel.The present invention is by calibration wind tunnel demarcation, rotor outlet, which can be measured, has the Three-dimensional Flow parameters such as the angle of pitch, deflection angle, stagnation pressure, static pressure and the Mach number of transonic speed three-dimensional flow field of the larger positive angle of pitch circumferentially distributed from pressure face to suction surface, and measured data foundation is provided to improve rotor performance.Compared with measuring the porous dynamic pressure probe of transonic speed three-dimensional flow field, head is only mounted with 1 dynamic pressure transducer, has the advantages that simple in construction, size is small, low cost.

Description

一种测量转子出口跨音三维流场的圆锥单孔动态压力探针A conical single-hole dynamic pressure probe for measuring the transonic three-dimensional flow field at the rotor outlet

技术领域technical field

本发明属于压力测试技术领域，涉及跨音速流场的动态压力测量装置，具体涉及一种测量转子出口跨音三维流场的圆锥单孔动态压力探针，适用于测量叶轮机械转子出口具有较大正俯仰角的跨音速三维流场，能够测得来流俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布。The invention belongs to the technical field of pressure testing, and relates to a dynamic pressure measuring device for a transonic flow field, in particular to a conical single-hole dynamic pressure probe for measuring a transonic three-dimensional flow field at a rotor outlet, which is suitable for measuring a rotor outlet of a turbomachinery with a relatively large positive pressure. The transonic three-dimensional flow field of pitch angle can measure the circumferential distribution of three-dimensional flow parameters such as incoming flow pitch angle, deflection angle, total pressure, static pressure and Mach number from the pressure surface to the suction surface.

背景技术Background technique

由于跨音压气机、风扇、涡轮等转子的旋转，采用常规的稳态压力探针，无法真实反映转子出口的动态流场，不能测量出转子出口从压力面到吸力面来流参数的周向分布，热线风速仪能够测量出转子出口的动态速度信号，但不能提供动态压力信息。跨音叶轮机试验更希望获得转子出口含有动态压力信息的测量数据，对于转子出口跨音三维流场，由于离心力的作用，一般具有较大的正俯仰角，希望获得转子出口俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布，用于验证转子的设计和流场诊断，以便改进机器性能。Due to the rotation of the rotors of transonic compressors, fans, turbines, etc., the use of conventional steady-state pressure probes cannot truly reflect the dynamic flow field at the rotor outlet, and cannot measure the circumferential direction of the flow parameters from the pressure surface to the suction surface at the rotor outlet. Distribution, the hot wire anemometer can measure the dynamic velocity signal at the rotor outlet, but cannot provide dynamic pressure information. For the test of transonic turbine, it is more desirable to obtain the measurement data containing dynamic pressure information at the rotor outlet. For the three-dimensional flow field of the rotor outlet transonic, due to the centrifugal force, it generally has a large positive pitch angle. It is hoped to obtain the pitch angle and deflection angle of the rotor outlet. The circumferential distribution of three-dimensional flow parameters such as , total pressure, static pressure and Mach number from the pressure surface to the suction surface is used to verify the design of the rotor and the diagnosis of the flow field in order to improve the performance of the machine.

现有的测量转子出口跨音速三维流动参数的动态压力探针至少开有2个压力感受孔，内装有2个动态压力传感器，一方面动态压力探针尺寸不容易做得小，另一方面，动态压力探针成本嫌高。The existing dynamic pressure probes for measuring the transonic three-dimensional flow parameters at the rotor outlet have at least two pressure sensing holes, and two dynamic pressure sensors are installed inside. On the one hand, the size of the dynamic pressure probes is not easy to make small; The cost of dynamic pressure probes is too high.

发明内容Contents of the invention

本发明要解决的技术问题是：测量转子出口具有较大正俯仰角的跨音速三维流场中，俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布。The technical problem to be solved by the present invention is to measure the three-dimensional flow parameters such as pitch angle, deflection angle, total pressure, static pressure and Mach number from the pressure surface to the suction surface in the transonic three-dimensional flow field with a relatively large positive pitch angle at the rotor outlet. Circumferential distribution.

为此，本发明提供了一种测量转子出口跨音三维流场的圆锥单孔动态压力探针，与多孔动态压力探针相比，头部只安装了1个动态压力传感器，相对具有结构简单、尺寸小、成本低的特点，适合于测量转子出口具有较大正俯仰角的跨音速三维流场中，俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布。For this reason, the present invention provides a conical single-hole dynamic pressure probe for measuring the transonic three-dimensional flow field at the outlet of the rotor. Compared with the multi-hole dynamic pressure probe, only one dynamic pressure sensor is installed on the head, which is relatively simple in structure. , small size and low cost, it is suitable for measuring three-dimensional flow parameters such as pitch angle, deflection angle, total pressure, static pressure and Mach number in the transonic three-dimensional flow field with a large positive pitch angle at the rotor outlet, from the pressure surface to the suction force Circumferential distribution of the surface.

本发明的技术解决方案是：Technical solution of the present invention is:

1、一种测量转子出口跨音三维流场的圆锥单孔动态压力探针，其特征在于：包括探针头部(1)、支杆(2)，所述探针头部(1)包括共底面的圆柱体(3)、圆锥体(4)，其内部封装一个动态压力传感器，在探针头部(1)的圆锥体(4)的侧面上，开有一个压力感受孔(5)，压力感受孔(5)与探针头部(1)内封装的那个动态压力传感器连通。压力感受孔(5)的中心线与探针头部(1)的圆柱体(3)的轴线在同一个平面上。探针头部(1)的圆柱体(3)的轴线与探针支杆(2)的轴线重合。1. A conical single-hole dynamic pressure probe for measuring the transonic three-dimensional flow field at the outlet of the rotor, characterized in that it includes a probe head (1) and a strut (2), and the probe head (1) includes A cylinder (3) and a cone (4) with a common bottom surface encapsulate a dynamic pressure sensor inside, and a pressure sensing hole (5) is opened on the side of the cone (4) of the probe head (1) , the pressure sensing hole (5) communicates with the dynamic pressure sensor packaged in the probe head (1). The center line of the pressure sensing hole (5) is on the same plane as the axis of the cylinder (3) of the probe head (1). The axis of the cylinder (3) of the probe head (1) coincides with the axis of the probe rod (2).

2、进一步，探针头部(1)的压力感受孔(5)的直径为0.6毫米至1.5毫米，压力感受孔(5)圆心与圆锥体(4)底面圆周的距离为1毫米至5毫米。2. Further, the diameter of the pressure sensing hole (5) of the probe head (1) is 0.6 mm to 1.5 mm, and the distance between the center of the pressure sensing hole (5) and the circumference of the bottom surface of the cone (4) is 1 mm to 5 mm .

3、进一步，探针头部(1)的圆柱体(3)的直径为1.5毫米至6毫米。3. Further, the diameter of the cylinder (3) of the probe head (1) is 1.5 mm to 6 mm.

4、进一步，探针头部(1)的圆锥体(4)的锥角为40°至160°。4. Further, the cone angle of the cone (4) of the probe head (1) is 40° to 160°.

5、进一步，探针头部(1)的圆柱体(3)长10毫米至40毫米。5. Further, the cylinder (3) of the probe head (1) is 10 mm to 40 mm long.

6、进一步，探针支杆(2)为圆柱体，其内部开有圆型管道，探针头部(1)内封装的动态压力传感器的线缆(6)通过探针支杆(2)内的管道引出探针尾部。6. Further, the probe support rod (2) is a cylinder with a circular pipe inside, and the cable (6) of the dynamic pressure sensor packaged in the probe head (1) passes through the probe support rod (2) The inner tubing leads out to the probe tail.

本发明的有益效果是：The beneficial effects of the present invention are:

本发明经过校准风洞标定，可测出转子出口具有较大正俯仰角的跨音速三维流场的俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布，为改进转子性能提供实测数据依据。与测量跨音速三维流场的多孔动态压力探针相比，头部只安装了1个动态压力传感器，具有结构简单、尺寸小、成本低的优点。The invention is calibrated by a wind tunnel, and can measure the pitch angle, deflection angle, total pressure, static pressure and Mach number of the three-dimensional flow parameters of the transonic three-dimensional flow field with a relatively large positive pitch angle at the rotor outlet from the pressure surface to the suction surface. Circumferential distribution provides the basis of measured data for improving rotor performance. Compared with the porous dynamic pressure probe for measuring transonic three-dimensional flow field, only one dynamic pressure sensor is installed in the head, which has the advantages of simple structure, small size and low cost.

附图说明Description of drawings

图1是本发明实施例中的测量转子出口跨音三维流场的圆锥单孔动态压力探针的结构示意图。Fig. 1 is a schematic structural view of a conical single-hole dynamic pressure probe for measuring a transonic three-dimensional flow field at a rotor outlet in an embodiment of the present invention.

其中：1-探针头部，2-探针支杆，3-圆柱体，4-圆锥体，5-压力感受孔，6-线缆。Among them: 1-probe head, 2-probe support rod, 3-cylinder, 4-cone, 5-pressure sensing hole, 6-cable.

具体实施方式detailed description

下面结合附图和具体实施例对本发明进行详细阐述。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

如图1所示，本实施例中介绍了一种测量转子出口跨音三维流场的圆锥单孔动态压力探针，包括探针头部(1)和支杆(2)，探针头部(1)包括共底面的圆柱体(3)、圆锥体(4)，其内部封装一个动态压力传感器，在探针头部(1)的圆锥体(4)的侧面上，开有一个压力感受孔(5)，压力感受孔(5)与探针头部(1)内封装的那个动态压力传感器连通。压力感受孔(5)的中心线与探针头部(1)的圆柱体(3)的轴线在同一个平面上。探针头部(1)的圆柱体(3)的轴线与探针支杆(2)的轴线重合。As shown in Figure 1, a conical single-hole dynamic pressure probe for measuring the transonic three-dimensional flow field at the rotor outlet is introduced in this embodiment, including a probe head (1) and a support rod (2), and the probe head (1) It includes a cylinder (3) and a cone (4) with a common bottom surface, and a dynamic pressure sensor is packaged inside it. On the side of the cone (4) of the probe head (1), there is a pressure sensor The hole (5), the pressure sensing hole (5) communicates with the dynamic pressure sensor packaged in the probe head (1). The center line of the pressure sensing hole (5) is on the same plane as the axis of the cylinder (3) of the probe head (1). The axis of the cylinder (3) of the probe head (1) coincides with the axis of the probe rod (2).

探针头部(1)的压力感受孔(5)的直径为0.6毫米，压力感受孔(5)圆心与圆锥体(4)底面圆周的距离为2.1毫米。The diameter of the pressure sensing hole (5) of the probe head (1) is 0.6 mm, and the distance between the center of the pressure sensing hole (5) and the circumference of the bottom surface of the cone (4) is 2.1 mm.

探针头部(1)的圆柱体(3)的直径为3毫米。The cylinder (3) of the probe head (1) has a diameter of 3 mm.

探针头部(1)的圆锥体(4)的锥角为90°。The cone (4) of the probe head (1) has a cone angle of 90°.

探针头部(1)的圆柱体(3)长35毫米。The cylinder (3) of the probe head (1) is 35 mm long.

探针支杆(2)为圆柱体，直径6毫米，其内部开有圆型通道，直径4毫米，探针头部(1)内封装的动态压力传感器的线缆(6)通过探针支杆(2)内的管道引出探针尾部。The probe support rod (2) is a cylinder with a diameter of 6 mm, and a circular channel with a diameter of 4 mm is opened inside it. The cable (6) of the dynamic pressure sensor packaged in the probe head (1) passes through the probe support. A pipe in the rod (2) leads to the end of the probe.

本发明实施例中介绍的测量转子出口跨音三维流场的圆锥单孔动态压力探针，经过跨音速校准风洞标定，可以获得标定数据。实际测量转子出口跨音速三维流场时，该圆锥单孔动态压力探针绕探针支杆轴线转动，放置几个不同角向位置，分别进行测量，由探针内装的那支动态压力传感器测得几组非定常压力数据，利用获得的跨音速校准风洞标定数据，进行数据处理，可以获得转子出口具有较大正俯仰角的跨音速三维流场中，俯仰角、偏转角、总压、静压和马赫数等三维流动参数从压力面到吸力面的周向分布。The conical single-hole dynamic pressure probe introduced in the embodiments of the present invention for measuring the transonic three-dimensional flow field at the rotor outlet can obtain calibration data after calibration in a transonic calibration wind tunnel. When actually measuring the transonic three-dimensional flow field at the outlet of the rotor, the conical single-hole dynamic pressure probe rotates around the axis of the probe rod, and places several different angular positions for measurement respectively. The dynamic pressure sensor installed in the probe measures Several sets of unsteady pressure data are obtained. Using the obtained transonic calibration wind tunnel calibration data for data processing, the pitch angle, deflection angle, total pressure, static The circumferential distribution of three-dimensional flow parameters such as pressure and Mach number from the pressure surface to the suction surface.

Claims (6)

1. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field, it is characterised in that：Including probe Head (1), pole (2), the end of probe (1) include the cylinder (3) of bottom surface, cone (4), its enclosed inside one altogether Dynamic pressure transducer, on the side of the cone (4) of end of probe (1), is provided with a pressure experience hole (5), feeling of stress Connected by hole (5) with that dynamic pressure transducer of encapsulation in end of probe (1).The center line in pressure experience hole (5) and spy The axis of the cylinder (3) of needle section (1) is in approximately the same plane.The axis of the cylinder (3) of end of probe (1) and probe branch The axis of bar (2) is overlapped.
2. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field according to claim 1, It is characterized in that：A diameter of 0.6 millimeter to 1.5 millimeters of the pressure experience hole (5) of the end of probe (1), pressure experience hole (5) center of circle and the distance of cone (4) base circumference are 1 millimeter to 5 millimeters.
3. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field according to claim 1, It is characterized in that：A diameter of 1.5 millimeters to 6 millimeters of the cylinder (3) of the end of probe (1).
4. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field according to claim 1, It is characterized in that：The cone angle of the cone (4) of the end of probe (1) is 40 ° to 160 °.
5. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field according to claim 1, It is characterized in that：The cylinder (3) of end of probe (1) is long 10 millimeters to 40 millimeters.
6. a kind of dynamic pressure probe of circular cone single hole for measuring rotor outlet across sound three-dimensional flow field according to claim 1, It is characterized in that：Described probe pole (2) is cylinder, and the dynamic of encapsulation in round pipeline, end of probe (1) is provided with inside it The cable (6) of state pressure sensor draws probe tails by the pipeline in probe pole (2).
CN201710115438.8A 2017-03-01 2017-03-01 Conical single-hole dynamic pressure probe for measuring rotor outlet transonic three-dimensional flow field Active CN106950003B (en)

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CN109540372A (en) * 2018-11-12 2019-03-29 中国飞行试验研究院 A kind of New Multi-mode pressure measurement probe
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CN113340561B (en) * 2021-08-02 2021-10-29 中国空气动力研究与发展中心空天技术研究所 Eccentric cylindrical single-hole pneumatic probe for measuring precision in high altitude

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