CN106940207B - Combined dynamic probe for measuring distortion flow field at inlet of turbine - Google Patents
Combined dynamic probe for measuring distortion flow field at inlet of turbine Download PDFInfo
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- CN106940207B CN106940207B CN201710201151.7A CN201710201151A CN106940207B CN 106940207 B CN106940207 B CN 106940207B CN 201710201151 A CN201710201151 A CN 201710201151A CN 106940207 B CN106940207 B CN 106940207B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention belongs to the technical field of pressure, temperature and speed testing, and discloses a combined dynamic probe for measuring a distorted flow field at an inlet of a turbine. The probe comprises a probe head and a support rod (1), wherein the probe head comprises a temperature sensor mounting hole (2), a pressure hole (3), a hot wire support (4) and a hot wire (5), the hot wire (5) is welded on the hot wire support, the pressure sensor is mounted at a position close to the pressure hole (3) in the probe head, the axis of the pressure hole (3) is perpendicular to the hot wire (5), and a lead (7) of the pressure sensor is led out through an internal channel of the support rod. The temperature sensor mounting hole (2) and the pressure hole (3) are located at the same circumferential position, and the sizes of the two holes are consistent. Compared with the existing pressure probe and temperature probe, the invention can simultaneously measure the dynamic parameters of the incoming flow such as total pressure, total temperature, velocity magnitude, direction, velocity pulsation and the like through calibration, and is suitable for measuring the total temperature, the total pressure and the turbulence degree of an inlet distortion flow field of the turbine.
Description
Technical Field
The invention belongs to the technical field of pressure, speed and temperature testing, and relates to a combined dynamic probe for measuring a turbine inlet distortion flow field.
Background
Along with the continuous improvement of the performance of the turbine, the working condition of the turbine is more complex, and the inlet of the turbine can generate serious inlet pressure distortion and even temperature distortion, so that the unevenness of a pressure field and a temperature field in the turbine can be directly influenced, and the working stability of the turbine and even the working stability of the whole system can be influenced.
The measurement of total temperature, total pressure and turbulence degree is an important means for researching intake distortion, most of the previous researches adopt a single probe to measure a certain parameter, in practical engineering application, a flow field generally has strong non-stationarity, the acquisition of the pressure, speed and turbulence degree parameters at the same time in the flow field is very important, and the method of simultaneously measuring by adopting multiple probes can greatly influence the flow field.
Therefore, a test technology capable of simultaneously obtaining information of turbulence, pressure and temperature of a flow field and having small influence on a measured flow field is lacked in the current research on the intake distortion of the turbine.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the lack of a test technology which can simultaneously obtain the information of the turbulence degree, the pressure and the temperature of a flow field and has small influence on the measured flow field in the research of the air inlet distortion of the existing turbine. The invention discloses a combined dynamic probe for measuring a distorted flow field at an inlet of a turbine.
The technical solution of the invention is as follows:
the probe comprises a probe head and a support rod (1), wherein the probe head comprises a temperature sensor mounting hole (2), a pressure hole (3), a hot wire support (4) and a hot wire (5), the hot wire (5) is welded on the hot wire support (4), a hot wire lead (6) is led out from an internal channel of the probe support rod (1), the pressure sensor is mounted at a position close to the pressure hole (3) in the probe head, a lead (7) of the pressure sensor is led out from the internal channel of the support rod (1), a temperature sensor sensing part is mounted at the position of the temperature sensor mounting hole (2), and a lead (8) of the temperature sensor is led out from the internal channel of the support rod (1).
Furthermore, the probe support rod (1) is a cylindrical hollow structure, and the diameter of the support rod can be selected from 4 to 10 mm.
Further, the material of the heat wire is tungsten, platinum or platinum-iridium alloy having a diameter of 1 to 30 μm, and the length-to-diameter ratio of the heat wire (5) is 100 to 600.
Furthermore, the hot wire support (4) is made of metal, the hot wire (5) is welded on the support, the support (4) is in insulated connection with the probe supporting rod (1), and the head structure of the hot wire is a single inclined wire.
Furthermore, the axis of the pressure hole (3) is perpendicular to the hot wire (5), the aperture size is 0.1-5 mm, and the pressure sensor is a high-frequency-response dynamic sensor.
Furthermore, the temperature sensor mounting hole (2) and the pressure hole (3) are located at the same circumferential position, the sizes of the two holes are consistent, the distance is more than 1 time of the hole diameter, the upper position and the lower position of the temperature sensor mounting hole (2) and the pressure hole (3) can be interchanged, and the temperature sensor can select a thermocouple or a thermal resistor with high frequency response.
Drawings
FIG. 1 is a schematic plan view of a combination dynamic probe for measuring fluid temperature, pressure and velocity.
The probe comprises a probe support rod 1, a temperature sensor mounting hole 2, a pressure hole 3, a hot wire support 4, a hot wire 5, a hot wire 6, a hot wire lead 7, a pressure sensor lead 8 and a temperature sensor lead 8.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in figure 1, the probe comprises a probe head and a support rod (1), wherein the probe head comprises a temperature sensor mounting hole (2), a pressure hole (3), a hot wire support (4) and a hot wire (5), the hot wire (5) is welded on the hot wire support (4), a hot wire lead (6) is led out from an internal channel of the probe support rod (1), the pressure sensor is arranged at a position close to the pressure hole (3) in the probe head, a lead (7) of the pressure sensor is led out from the internal channel of the support rod (1), a temperature sensor sensing part is arranged at the position of the temperature sensor mounting hole (2), and a lead (8) of the temperature sensor is led out from the internal channel of the support rod (1).
The probe supporting rod (1) is of a cylindrical hollow structure, and the diameter of the supporting rod can be selected to be 4 mm.
The material of the hot wire is tungsten, platinum or platinum-iridium alloy, the diameter of the hot wire is 5 microns, and the ratio of the length to the diameter of the hot wire (5) is 600.
The hot wire support (4) is made of metal, the hot wire (5) is welded on the support, the support (4) is connected with the probe supporting rod (1) in an insulating mode, and the head structure of the hot wire is a single inclined wire.
The axis of the pressure hole (3) is vertical to the hot wire (5), the aperture size is 0.4 mm, and the pressure sensor is a dynamic sensor with high frequency response.
The temperature sensor mounting hole (2) and the pressure hole (3) are located at the same circumferential position, the sizes of the two holes are consistent, and the temperature sensor can select a thermocouple with high frequency response.
The combined dynamic probe for measuring the distorted flow field at the inlet of the turbine can obtain calibration data through calibration. During actual flow field measurement, a rotating probe method is adopted, a voltage signal of a hot wire can be obtained through a lead of the hot wire probe, a voltage signal of a pressure sensor can be obtained through a lead of the pressure sensor, a voltage signal of a temperature sensor can be obtained through a lead of the temperature sensor, data processing is carried out by utilizing obtained calibration data, and dynamic information such as turbulence, total pressure, total temperature and the like of an inlet distortion flow field of the turbine can be obtained.
Claims (1)
1. A combined dynamic probe for measuring the inlet distortion flow field of a turbine is characterized in that: the probe comprises a probe head and a support rod (1), wherein the probe head comprises a temperature sensor mounting hole (2), a pressure hole (3), a hot wire support (4) and a hot wire (5), the hot wire (5) is welded on the hot wire support (4), a hot wire lead (6) is led out from an internal channel of the probe support rod (1), the pressure sensor is mounted at a position close to the pressure hole (3) in the probe head, a lead (7) of the pressure sensor is led out from the internal channel of the support rod (1), a temperature sensor sensing part is mounted at the position of the temperature sensor mounting hole (2), and a lead (8) of the temperature sensor is led out from the internal channel of the support rod (1); the probe supporting rod (1) is of a cylindrical hollow structure, and the diameter of the supporting rod is 4 mm; the material of the hot wire is tungsten, platinum or platinum-iridium alloy, the diameter of the hot wire is 1 to 30 micrometers, and the ratio of the length to the diameter of the hot wire (5) is 600; the hot wire support (4) is made of metal, the hot wire (5) is welded on the support, the support (4) is in insulated connection with the probe support rod (1), and the head structure of the hot wire is a single inclined wire; the axis of the pressure hole (3) is vertical to the hot wire (5), the aperture size is 0.4 mm, and the pressure sensor is a dynamic sensor with high frequency response; the temperature sensor mounting hole (2) and the pressure hole (3) are located at the same circumferential position, the sizes of the two holes are consistent, the distance is more than 1 time of the hole diameter, the upper position and the lower position of the temperature sensor mounting hole (2) and the pressure hole (3) can be interchanged, and the temperature sensor can select a thermocouple or a thermal resistor with high frequency response.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201151.7A CN106940207B (en) | 2017-03-30 | 2017-03-30 | Combined dynamic probe for measuring distortion flow field at inlet of turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201151.7A CN106940207B (en) | 2017-03-30 | 2017-03-30 | Combined dynamic probe for measuring distortion flow field at inlet of turbine |
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| Publication Number | Publication Date |
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| CN106940207A CN106940207A (en) | 2017-07-11 |
| CN106940207B true CN106940207B (en) | 2020-07-03 |
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| CN201710201151.7A Active CN106940207B (en) | 2017-03-30 | 2017-03-30 | Combined dynamic probe for measuring distortion flow field at inlet of turbine |
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| CN109374303A (en) * | 2018-12-16 | 2019-02-22 | 中国航发沈阳发动机研究所 | The probe of booster stage import after measurement engine blower rotor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203053472U (en) * | 2012-09-18 | 2013-07-10 | 天津空中代码工程应用软件开发有限公司 | Tool for measuring pressure and velocity of eddy flow field |
| CN204373690U (en) * | 2015-01-13 | 2015-06-03 | 西安远方航空技术发展总公司 | A kind of stagnation temperature total pressure measure apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH521657A (en) * | 1970-12-14 | 1972-04-15 | Proton Ag | Measurement device with removable measurement probe |
| US4271859A (en) * | 1979-11-26 | 1981-06-09 | United Technologies Corporation | Temperature sensor |
| CN201662459U (en) * | 2009-09-07 | 2010-12-01 | 天津空中代码工程应用软件开发有限公司 | Combined measuring tool for flow field pressure and speed |
| CN101788313B (en) * | 2010-03-23 | 2011-06-29 | 上海交通大学 | High-frequency response fluid transient flow meter |
| CN106483330A (en) * | 2016-12-07 | 2017-03-08 | 中南大学 | One kind is based on reflective silk thread attitude angle visual identity two-D wind speed wind direction method of testing |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203053472U (en) * | 2012-09-18 | 2013-07-10 | 天津空中代码工程应用软件开发有限公司 | Tool for measuring pressure and velocity of eddy flow field |
| CN204373690U (en) * | 2015-01-13 | 2015-06-03 | 西安远方航空技术发展总公司 | A kind of stagnation temperature total pressure measure apparatus |
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| CN106940207A (en) | 2017-07-11 |
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