CN111089704A - Probe for measuring whole parameters of transonic three-dimensional steady-state flow field - Google Patents

Probe for measuring whole parameters of transonic three-dimensional steady-state flow field Download PDF

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CN111089704A
CN111089704A CN202010068029.9A CN202010068029A CN111089704A CN 111089704 A CN111089704 A CN 111089704A CN 202010068029 A CN202010068029 A CN 202010068029A CN 111089704 A CN111089704 A CN 111089704A
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probe
pressure
pressure measuring
hole
temperature sensor
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马宏伟
屈冬平
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Beihang University
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Beihang University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
    • G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
    • G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
    • 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 flow field testing, and particularly relates to a probe for measuring whole parameters of a transonic three-dimensional steady-state flow field. The probe head is cylindrical, the top end of the cylindrical structure extends out of a circular table structure in the direction perpendicular to the central line of the cylinder, a pressure measuring middle hole is formed in the top surface of the circular table, a pressure measuring upper hole, a pressure measuring lower hole, a pressure measuring left hole and a pressure measuring right hole which are not communicated with each other are uniformly formed in the side surface of the circular table, six circular convection heat exchange holes are formed in the leeward side of the probe head back to the circular table, and the circular convection heat exchange holes are distributed in a low-speed separation area. The probe can simultaneously measure total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed and density of a transonic three-dimensional steady-state flow field, and has the characteristics of small size, large air flow insensitive angle, high reliability, high spatial resolution and high measurement precision.

Description

Probe for measuring whole parameters of transonic three-dimensional steady-state flow field
Technical Field
The invention belongs to the technical field of flow field testing, and particularly relates to a probe for measuring transonic three-dimensional steady-state flow field overall parameters, which is suitable for measuring transonic speed three-dimensional steady-state flow field overall parameters of an inlet, an outlet and an interstage of an impeller machine.
Background
At present, a five-hole pressure probe is commonly adopted to obtain the total pressure, static pressure, deflection angle, pitch angle and Mach number of a transonic three-dimensional steady-state flow field, temperature parameters cannot be measured by measuring the five-hole pressure probe, and a total temperature probe is additionally adopted to measure the incoming flow temperature. Most of the existing temperature probes are designed according to the requirement that a temperature sensor faces a main stream, the head of the temperature probe adopts a stagnation cover structure to collect incoming flow, and the temperature sensor is arranged in the stagnation cover; secondly, the strength of the temperature sensor is generally improved by increasing the size of the temperature sensor, and the size of the stagnation cover is added, so that the size of the probe is large, and the spatial resolution is poor; thirdly, the insensitive angle of the airflow is small, and when the deflection angle or the pitch angle of the incoming flow to be detected is large, the airflow cannot be fully stagnated; meanwhile, the surface heat exchange of the temperature sensor is insufficient, and the total temperature measurement error is large.
For a transonic three-dimensional flow field, a pressure probe and a temperature probe are usually used separately for measuring pressure and temperature respectively, two probes are adopted for simultaneous measurement, on one hand, the measured flow field is greatly interfered, on the other hand, the test complexity and the test cost are increased, most importantly, the flow parameters measured by different probes cannot be guaranteed to come from the same streamline, so that extra errors are brought when the parameters such as speed and the like are combined and calculated, and the test precision is reduced. The temperature and the pressure of a transonic flow field are measured simultaneously by adopting a single temperature and pressure combined probe, and the temperature sensors of the conventional temperature and pressure combined probe are over against the windward side of the main flow at the head part of the probe, so that the defects of the temperature probe exist. Particularly, for transonic velocity flow fields, the air flow velocity is high, the probe can be impacted by the high velocity of the air flow, the temperature sensor is easy to damage just opposite to the main flow, and the existing probe testing technology is difficult to meet the measurement requirement of transonic velocity three-dimensional flow fields. Therefore, a probe with high precision and reliability and capable of measuring all parameters of the transonic three-dimensional steady-state flow field is urgently needed to be developed so as to accurately measure all parameters of the transonic three-dimensional flow field, such as total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, speed, density and the like.
Disclosure of Invention
The probe for measuring the whole parameters of the transonic three-dimensional steady-state flow field is characterized in that the head of the probe is cylindrical, the top end of the cylindrical probe extends out of a circular table structure in a direction perpendicular to the central line of a cylinder, the central line of the circular table is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole is formed in the upper top surface of the circular table, and a pressure measuring upper hole, a pressure measuring lower hole, a pressure measuring left hole and a pressure measuring right hole which are not communicated with each other are uniformly formed in the side surface. The invention abandons the traditional design concept of the total temperature probe, does not design according to the method that the temperature sensor faces the main stream and the stagnation cover is adopted to make the airflow stagnation so as to realize the total temperature measurement, but based on years of research of the applicant, creatively provides the layout and the structural design that the temperature sensor faces away from the main stream and six circular convection heat exchange holes are arranged on the leeward side of the head part of the probe, effectively reduces the influence of the air flow on the temperature sensor, oil drops, dust and the like mixed in the air flow and the like, and prolongs the service life of the temperature sensor; the size of the head of the probe is effectively reduced, and the spatial resolution of the probe is improved; the convective heat transfer between the air flow and the temperature sensor is enhanced, so that the temperature recovery coefficient is high and stable in a large deflection angle and pitch angle range; and the temperature sensor is arranged on the central axis of the pressure measuring middle hole, so that the full-parameter measurement of the same streamline can be ensured. Most importantly, the probe for measuring the whole parameters of the transonic three-dimensional steady-state flow field can simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the three-dimensional steady-state flow field by adopting a single probe.
The invention provides a probe for measuring whole parameters of a transonic three-dimensional steady-state flow field, which aims to solve the technical problems that: firstly, the existing probe cannot simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density parameter of a transonic three-dimensional steady-state flow field; secondly, the existing temperature probe temperature sensor is easy to damage and short in service life; thirdly, the existing probe has the problems of large size and poor spatial resolution; fourthly, the current temperature probe has the problem of small insensitive angle of airflow.
The technical scheme of the invention is as follows:
1. the utility model provides a measure probe of three-dimensional steady state flow field full parameter of sound strides, by probe head (1), temperature sensor (2), convection heat transfer hole (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement upper aperture (7), pressure measurement lower aperture (8), pressure measurement left side hole (9), pressure measurement right side hole (10), pressure tube passageway (11), probe branch (12), pressure tube (13) and temperature sensor cable (14) are pressed to the pressure measurement and are constituteed, its characterized in that: the probe head part (1) is cylindrical, a circular table structure extends out of the cylindrical top end in the direction perpendicular to the central line of a cylinder, the central line of the circular table is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole (6) is formed in the top surface of the circular table, a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) which are not communicated with each other are uniformly formed in the side surface of the circular table, a circular channel is formed close to the leeward side of the probe head part (1) along the axial direction, six circular convection heat exchange holes (3) are formed in the leeward side of the probe head part (1) which is opposite to the circular table, the six convection heat exchange.
2. Further, the columniform diameter of probe head (1) is 2 ~ 8 millimeters, length is 10 ~ 45 millimeters, five circular leading pressure pipe passageways (11) and a circular temperature sensor cable extraction passageway (5) that do not communicate with each other are seted up along the probe axial, five circular leading pressure pipe passageways (11) respectively with pressure measurement mesopore (6) on probe head (1) top, pressure measurement upper orifice (7), pressure measurement lower orifice (8), pressure measurement left side hole (9), pressure measurement right side hole (10) intercommunication, and respectively with encapsulate five leading pressure pipe (13) of probe head (1) and probe branch (12) junction, leading pressure pipe (13) draw out probe branch (12) afterbody through leading pressure pipe passageway (11) in probe branch (12).
3. Further, the distance from the upper top surface of a circular table structure extending out of the probe head (1) in the direction vertical to the central line of the column body is 1.8 times of the radius of a cylinder of the probe head (1), the diameter of the upper top surface is 0.5-2 mm, the diameter of the lower bottom surface is 1.5-6 mm, the distance from the upper top surface to the lower bottom surface is 0.5-2 mm, the circular table structure is connected with the probe head (1) through the cylinder, the diameter of the cylinder is the same as that of the lower bottom surface of the circular table, a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are circular and have the same diameter, 0.2-1.5 mm, and the, the distance between the probe head and the top end face of the probe head (1) is 0.8-3 mm, and the pressure measuring upper hole (7), the pressure measuring lower hole (8), the pressure measuring left hole (9) and the pressure measuring right hole (10) are all perpendicular to the side face of the circular truncated cone.
4. Furthermore, the six convective heat transfer holes (3) are circular and have the same diameter of 0.5-2.5 mm, three convective heat transfer holes (3) are uniformly distributed along two axial positions of the probe head (1) in the circumferential direction, the circumferential included angle of the adjacent convective heat transfer holes (3) on the surface of the cylinder of the probe head (1) is 60-75 degrees, the plane where the central lines of the three convective heat transfer holes (3) are uniformly distributed in the circumferential direction is perpendicular to the central line of the cylinder, wherein the plane where the central lines of the convective heat transfer holes (3) are close to the top end surface of the probe head (1) is 0.5-1 mm away from the top end surface of the probe head (1), the axial distance between the convective heat transfer holes (3) at adjacent and different axial positions is 0.6-4 mm, the diameter of the circular channel where the head of the temperature sensor (2) is located is 0.8-3.5 mm, the axial length of the circular channel is 2-12 mm, the axis of the circular channel is coincided with the axis of the temperature sensor cable leading-out channel (5), the central axis of the temperature sensor cable leading-out channel (5) is 0.7-3 mm away from the central line of the cylinder, the central axis of the temperature sensor cable leading-out channel (5), the central line of the cylinder and the central line of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the intersection point of the axis of the circular temperature sensor cable leading-out channel (5) and the central line of the pressure measuring mesopore (6), the temperature sensor (2) is not aligned with the convection heat exchange hole (3), the radiation error in the temperature measuring process can be effectively reduced, the temperature sensor (2) is fixed through the heat insulation sealing element (4), the heat insulation sealing element (4) plays the roles of heat insulation, sealing and fixing, the temperature sensor (2) and the heat insulation, then the opening at the top end of the probe head (1) is covered and welded. The temperature sensor cable (14) is led out of the tail of the probe supporting rod (12) through a temperature sensor cable leading-out channel (5) in the probe, and the cylindrical axis of the head part (1) of the probe is superposed with the cylindrical axis of the probe supporting rod (12).
5. After the probe is calibrated, the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the transonic three-dimensional flow field can be measured simultaneously.
The invention has the beneficial effects that:
the probe for measuring the whole parameters of the transonic three-dimensional steady-state flow field can simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the transonic three-dimensional steady-state flow field by using a single probe, effectively reduces the interference on the measured flow field, improves the test precision, simplifies the test operation and reduces the test cost.
The temperature sensor is back to the main stream, the convection heat exchange hole is formed in the low-speed separation area of the streaming around the probe head, so that the scouring of the temperature sensor by airflow is reduced, the influence of oil drops, dust and the like mixed in the airflow on the temperature sensor is reduced, and the service life of the temperature sensor is effectively prolonged; secondly, the strength requirement on the temperature sensor is low, so that a smaller and thinner temperature sensor can be selected, meanwhile, the pressure measuring hole and the convection heat exchange hole are respectively arranged on the windward side and the leeward side of the head of the probe, the head space of the probe is fully utilized, and a stagnation cover is not needed for collecting incoming flow, so that the probe is small in size and high in spatial resolution; thirdly, the range of the separation low-speed area is large, and the heat exchange between the airflow and the temperature sensor is effectively enhanced by the vortex in the separation area, so that the temperature recovery coefficient is high and stable in the ranges of a large deflection angle and a large pitch angle during measurement. Meanwhile, the temperature sensor is arranged on the leeward side of the head of the probe and is opposite to the pressure measuring middle hole on the windward side, so that simultaneous measurement of multiple parameters of the same streamline is at least ensured.
The probe for measuring the whole parameters of the transonic three-dimensional steady-state flow field can simultaneously measure the whole parameters of the transonic three-dimensional steady-state flow field, and has the characteristics of small size, large airflow insensitivity angle, high reliability, high spatial resolution and high measurement precision.
Drawings
Fig. 1 is a schematic structural diagram of a probe for measuring full parameters of a transonic three-dimensional steady-state flow field in a first embodiment of the present invention.
Fig. 2 is a view in the direction a of fig. 1.
Fig. 3 is a right side view of fig. 1.
Fig. 4 is a left side view of fig. 1.
Wherein: 1-probe head, 2-temperature sensor, 3-convection heat transfer hole, 4-heat insulation sealing piece, 5-temperature sensor cable leading-out channel, 6-pressure measuring middle hole, 7-pressure measuring upper hole, 8-pressure measuring lower hole, 9-pressure measuring left hole, 10-pressure measuring right hole, 11-pressure leading pipe channel, 12-probe supporting rod, 13-pressure leading pipe and 14-temperature sensor cable.
FIG. 5 is a schematic diagram of a probe of the present invention used to measure a three-dimensional flow field between compressor stages.
Wherein: 1-casing wall, 2-hub wall, 3-first-stage stator, 4-second-stage rotor, 5-probe of the invention, 6-second-stage stator.
Fig. 6 is a schematic structural diagram of a probe for measuring full parameters of a transonic three-dimensional steady-state flow field in the second embodiment of the present invention.
Fig. 7 is a view from direction a of fig. 6.
Fig. 8 is a right side view of fig. 6.
Fig. 9 is a left side view of fig. 6.
Wherein: 1-probe head, 2-temperature sensor, 3-convection heat transfer hole, 4-heat insulation sealing piece, 5-temperature sensor cable leading-out channel, 6-pressure measuring middle hole, 7-pressure measuring upper hole, 8-pressure measuring lower hole, 9-pressure measuring left hole, 10-pressure measuring right hole, 11-pressure leading pipe channel, 12-probe supporting rod, 13-pressure leading pipe and 14-temperature sensor cable.
FIG. 10 is a schematic view of a probe of the present invention used to measure the three-dimensional flow field at the compressor inlet.
Wherein: 1-casing wall, 2-hub wall, 3-probe of the invention, 4-first-stage stator, 5-second-stage rotor, 6-second-stage stator.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The first embodiment is as follows:
for the measurement of the three-dimensional flow field between turbine stages, the measurement space is narrow, the incoming flow three-dimensional performance is strong, in order to ensure the space resolution, the transverse size of the probe head and the diameter of a pressure measuring hole are selected to be small, and the temperature sensor can adopt a bare wire thermocouple with smaller size to ensure the fine measurement and improve the measurement precision, so the following implementation mode can be adopted:
fig. 1-4 are schematic diagrams of the probe applied to the interstage measurement of the compressor, and fig. 5 is a schematic diagram of the installation of the probe applied to the measurement of the three-dimensional flow field of the interstage of the compressor. The utility model provides a measure probe of three-dimensional steady state flow field full parameter of sound strides, by probe head (1), temperature sensor (2), convection heat transfer hole (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement upper aperture (7), pressure measurement lower aperture (8), pressure measurement left side hole (9), pressure measurement right side hole (10), pressure tube passageway (11), probe branch (12), pressure tube (13) and temperature sensor cable (14) are pressed to the pressure measurement and are constituteed, its characterized in that: the probe head (1) is cylindrical, the top end of the cylinder extends out of a circular table structure in a direction perpendicular to the central line of a cylinder, the central line of the circular table is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole (6) is formed in the top surface of the circular table, a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) which are not communicated with each other are uniformly formed in the side surface of the circular table, a circular channel is axially formed on the leeward side close to the probe head (1), and six circular convective heat exchange holes (3) are formed on the leeward side; the temperature sensor is a bare wire thermocouple;
the probe head (1) is cylindrical, the diameter is 2 mm, the length is 10 mm, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) which are not communicated with each other are arranged along the axial direction of the probe, the five circular pressure leading pipe channels (11) are respectively communicated with a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) at the top end of the probe head (1) and are respectively communicated with five pressure leading pipes (13) which are packaged at the joint of the probe head (1) and a probe supporting rod (12), and the tail parts of the probe supporting rod (12) are led out from the pressure leading pipe channels (11) in the probe supporting rod (12) through the pressure leading pipes;
the distance from the upper top surface of a circular table structure extending out of the probe head (1) in the direction vertical to the central line of the column body is 1.8 times of the radius of a cylinder of the probe head (1), the diameter of the upper top surface is 0.5 mm, the diameter of the lower bottom surface is 1.5 mm, the distance from the upper top surface to the lower bottom surface is 0.5 mm, the circular table structure is connected with the probe head (1) through the cylinder, the diameter of the cylinder is the same as that of the lower bottom surface of the circular table, a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are circular and have the same diameter, namely 0.2 mm, the distance between the probe head (1) and the top end face is 0.8 mm, and a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are all arranged in a manner of being vertical to the side face of the circular truncated cone;
the six convection heat exchange holes (3) are circular and have the same diameter and are 0.5 mm, three convection heat exchange holes (3) are uniformly distributed along two axial positions of the probe head (1) in the circumferential direction, the circumferential included angle of the adjacent convection heat exchange holes (3) on the surface of a cylinder of the probe head (1) is 60 degrees, the plane where the central lines of the three convection heat exchange holes (3) uniformly distributed along the circumferential direction are perpendicular to the central line of the cylinder, wherein the plane where the central lines of the three convection heat exchange holes (3) are located is closer to the top end surface of the probe head (1), the distance between the plane where the central lines are located and the top end surface of the probe head (1) is 0.5 mm, the axial spacing distance between the convection heat exchange holes (3) at adjacent and different axial positions is 0.6 mm, the diameter of a circular channel where the head of the temperature sensor (2) is located is 0.8 mm, the axial length of the circular channel is 2 mm, the central axis of the temperature sensor cable leading-out channel (5) is 0.7 mm away from the central axis of the cylinder, the central axis of the temperature sensor cable leading-out channel (5), the central axis of the cylinder and the central axis of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the intersection point of the axis of the circular temperature sensor cable leading-out channel (5) and the central axis of the pressure measuring mesopore (6), the temperature sensor (2) is fixed through a heat insulation sealing element (4), the tail of the probe supporting rod (12) is led out of the temperature sensor cable (14) through the temperature sensor cable leading-out channel (5) in the probe, and the cylindrical axis of the probe head (1) and the cylindrical axis.
The probe for measuring the whole parameters of the transonic three-dimensional steady-state flow field can simultaneously measure the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the transonic three-dimensional steady-state flow field. The specific use method is as follows:
the probe of the invention needs to be calibrated before use, and a pneumatic calibration curve of the probe is obtained. The probe calibration is carried out in a calibration wind tunnel, the deflection angle and the pitch angle of the probe are respectively changed under different Mach numbers within a calibration range, and curves of the deflection angle coefficient, the pitch angle coefficient, the total pressure coefficient, the static pressure coefficient and the temperature recovery coefficient of the probe, which are respectively changed along with the pitch angle and the deflection angle, are determined through pneumatic calibration; the yaw angle coefficient, pitch angle coefficient, total pressure coefficient, static pressure coefficient and temperature recovery coefficient are defined as follows:
Figure BDA0002375299280000051
Figure BDA0002375299280000052
Figure BDA0002375299280000053
Figure BDA0002375299280000054
Figure BDA0002375299280000055
Figure BDA0002375299280000056
wherein, CpyAs coefficient of deflection angle, CppIs the coefficient of pitch angle, CptIs the total pressure coefficient, CpsIs a static pressure coefficient, CTFor the recovery of coefficient of temperature, Pt、Ps、TtAnd TsRespectively calibrating the total pressure, static pressure, total temperature and static temperature of the wind tunnel incoming flow, P1、P2、P3、P4And P5Pressure values measured by a middle pressure measuring hole, a left pressure measuring hole, a right pressure measuring hole, an upper pressure measuring hole and a lower pressure measuring hole of the probe are respectively TpIs the temperature value measured by the temperature sensor.
When the three-dimensional steady-state flow field temperature measuring probe is used, the probe is inserted into a measured flow field to obtain pressure measured by the five pressure measuring holes and temperature measured by the temperature sensor on the leeward side of the head of the probe, and the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the three-dimensional steady-state flow field are obtained by combining the following formulas based on the pressure measured by the five pressure measuring holes and the temperature measured by the temperature sensor on the leeward side of the head of the probe according to the known.
Figure BDA0002375299280000057
Figure BDA0002375299280000058
Figure BDA0002375299280000059
c2＝γRTs
PS＝ρRTS
Wherein, PtAnd PsIs total pressure and static pressure of the flow field, gamma is adiabatic index of the flow field, TtAnd TsThe total temperature and the static temperature of the flow field, Ma is the Mach number of the flow field, v is the flow field velocity, rho is the density, c is the local acoustic velocity of the flow field, and R is the gas constant.
The second embodiment:
for the measurement of the three-dimensional flow field at the inlet of the compressor, the incoming flow is uniform, but the incoming flow is easy to contain impurities such as dust and the like. Therefore, the transverse size of the probe head is selected to be larger to ensure the strength and rigidity, the diameter of the pressure measuring hole is selected to be larger to prevent impurities from polluting and blocking, and the temperature sensor can adopt an armored thermocouple to ensure the service life. The following embodiments may thus be employed:
fig. 6-9 are schematic diagrams of the probe of the invention applied to measuring the inlet of the compressor, and fig. 10 is a schematic diagram of the probe of the invention applied to measuring the three-dimensional flow field of the inlet of the compressor. The utility model provides a measure probe of three-dimensional steady state flow field full parameter of sound strides, by probe head (1), temperature sensor (2), convection heat transfer hole (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement upper aperture (7), pressure measurement lower aperture (8), pressure measurement left side hole (9), pressure measurement right side hole (10), pressure tube passageway (11), probe branch (12), pressure tube (13) and temperature sensor cable (14) are pressed to the pressure measurement and are constituteed, its characterized in that: the probe head (1) is cylindrical, the top end of the cylinder extends out of a circular table structure in a direction perpendicular to the central line of a cylinder, the central line of the circular table is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole (6) is formed in the top surface of the circular table, a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) which are not communicated with each other are uniformly formed in the side surface of the circular table, a circular channel is axially formed on the leeward side close to the probe head (1), and six circular convective heat exchange holes (3) are formed on the leeward side; the temperature sensor is an armored thermocouple;
the probe head (1) is cylindrical, the diameter is 8 mm, the length is 45 mm, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) which are not communicated with each other are arranged along the axial direction of the probe, the five circular pressure leading pipe channels (11) are respectively communicated with a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) at the top end of the probe head (1) and are respectively communicated with five pressure leading pipes (13) which are packaged at the joint of the probe head (1) and a probe supporting rod (12), and the tail parts of the probe supporting rod (12) are led out from the pressure leading pipe channels (11) in the probe supporting rod (12) through the pressure leading pipes;
the distance between the upper top surface of a circular table structure extending out of the probe head (1) in the direction vertical to the central line of the column body and the central line of the column body is 1.8 times of the radius of a cylinder of the probe head (1), the diameter of the upper top surface is 2 mm, the diameter of the lower bottom surface is 6 mm, the distance between the upper top surface and the lower bottom surface is 2 mm, the circular table structure is connected with the probe head (1) through the cylinder, the diameter of the cylinder is the same as that of the lower bottom surface of the circular table, a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are circular and have the same diameter of 1.5 mm, and, the distance between the probe head (1) and the top end face is 3 mm, and a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are all arranged in a manner of being vertical to the side face of the circular truncated cone;
the six convection heat exchange holes (3) are circular and have the same diameter and are 2.5 mm, three convection heat exchange holes (3) are uniformly distributed along two axial positions of the probe head (1) in the circumferential direction, the circumferential included angle of the adjacent convection heat exchange holes (3) on the surface of a cylinder of the probe head (1) is 75 degrees, the plane where the central lines of the three convection heat exchange holes (3) uniformly distributed along the circumferential direction are perpendicular to the central line of the cylinder, wherein the plane where the central lines are located is a row of the convection heat exchange holes (3) close to the top end surface of the probe head (1), the distance between the plane where the central lines are located and the top end surface of the probe head (1) is 1 mm, the axial interval distance between the adjacent convection heat exchange holes (3) in different axial positions is 4 mm, the diameter of a circular channel where the head of the temperature sensor (2) is located is 3.5 mm, the length of the circular channel is 12 mm along the, the central axis of the temperature sensor cable leading-out channel (5) is 3 mm away from the central axis of the cylinder, the central axis of the temperature sensor cable leading-out channel (5), the central axis of the cylinder and the central axis of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the intersection point of the axis of the circular temperature sensor cable leading-out channel (5) and the central axis of the pressure measuring mesopore (6), the temperature sensor (2) is fixed through a heat insulation sealing element (4), the temperature sensor cable (14) is led out of the tail of the probe supporting rod (12) through the temperature sensor cable leading-out channel (5) in the probe, and the cylindrical axis of the probe head (1) is superposed with;
that is, the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the deflection angle, the pitch angle, the speed and the density of the transonic three-dimensional steady-state flow field can be simultaneously obtained by adopting a single probe, so that the interference on the measured flow field is effectively reduced, the test precision is improved, the test operation is simplified, and the test cost is reduced; the temperature sensor is back to the main stream, and the layout and the structural design of six circular convection heat exchange holes are formed in the leeward side of the head part of the probe, so that the influence of the scouring of airflow on the temperature sensor and the influence of oil drops, dust and the like mixed in the airflow on the temperature sensor are effectively reduced, and the service life of the temperature sensor is prolonged; the size of the head of the probe is effectively reduced, and the spatial resolution of the probe is improved; the convective heat transfer between the air flow and the temperature sensor is enhanced, so that the temperature recovery coefficient is high and stable in a large deflection angle and pitch angle range; and the temperature sensor is positioned on the central axis of the pressure measuring middle hole, so that multi-parameter measurement of the same streamline can be ensured. The probe effectively solves the problems that the existing probe cannot simultaneously measure total temperature, total pressure, static temperature, static pressure, Mach number, deflection angle, pitch angle, speed and density parameters of a transonic three-dimensional steady-state flow field, and solves the problems that the existing temperature probe temperature sensor is easy to damage and short in service life; the problems of large size and poor spatial resolution of the conventional probe are solved; the problem of current temperature probe airflow insensitive angle little is solved.

Claims (1)

1. The utility model provides a measure probe of three-dimensional steady state flow field full parameter of sound strides, by probe head (1), temperature sensor (2), convection heat transfer hole (3), adiabatic insulating seal (4), temperature sensor cable draw forth passageway (5), pressure measurement mesopore (6), pressure measurement upper aperture (7), pressure measurement lower aperture (8), pressure measurement left side hole (9), pressure measurement right side hole (10), pressure tube passageway (11), probe branch (12), pressure tube (13) and temperature sensor cable (14) are pressed to the pressure measurement and are constituteed, its characterized in that: the probe head (1) is cylindrical, the top end of the cylinder extends out of a circular table structure in a direction perpendicular to the central line of a cylinder, the central line of the circular table is perpendicular to and intersected with the central line of the cylinder, a pressure measuring middle hole (6) is formed in the top surface of the circular table, a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) which are not communicated with each other are uniformly formed in the side surface of the circular table, a circular channel is axially formed on the leeward side close to the probe head (1), and six circular convective heat exchange holes (3) are formed on the leeward side;
the probe head (1) is cylindrical, the diameter is 2-8 mm, the length is 10-45 mm, five circular pressure leading pipe channels (11) and a circular temperature sensor cable leading-out channel (5) which are not communicated with each other are arranged along the axial direction of the probe, the five circular pressure leading pipe channels (11) are respectively communicated with a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) at the top end of the probe head (1) and are respectively communicated with five pressure leading pipes (13) which are packaged at the joint of the probe head (1) and a probe supporting rod (12), and the pressure leading pipes (13) are led out of the tail of the probe supporting rod (12) through the pressure leading pipe channels (11) in the probe supporting rod (;
the distance between the upper top surface of a circular table structure extending out of the probe head (1) in the direction vertical to the central line of the column body and the central line of the column body is 1.8 times of the radius of a cylinder of the probe head (1), the diameter of the upper top surface is 0.5-2 mm, the diameter of the lower bottom surface is 1.5-6 mm, the distance between the upper top surface and the lower bottom surface is 0.5-2 mm, the circular table structure is connected with the probe head (1) through the cylinder, the diameter of the cylinder is the same as that of the lower bottom surface of the circular table, a pressure measuring middle hole (6), a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are circular and have the same diameter and are 0.2-1.5 mm, the distance between the probe head (1) and the top end face is 0.8-3 mm, and a pressure measuring upper hole (7), a pressure measuring lower hole (8), a pressure measuring left hole (9) and a pressure measuring right hole (10) are all formed in a manner of being vertical to the side face of the circular truncated cone;
the six convective heat transfer holes (3) are circular and have the same diameter and are 0.5-2.5 mm, three convective heat transfer holes (3) are uniformly distributed along two axial positions of the probe head (1) in the circumferential direction, the circumferential included angle of the adjacent convective heat transfer holes (3) on the surface of the cylinder of the probe head (1) is 60-75 degrees, the plane of the central line of the three convective heat transfer holes (3) uniformly distributed along the circumferential direction is perpendicular to the central line of the cylinder, wherein the convective heat transfer holes (3) are arranged in a row which is closer to the top end surface of the probe head (1), the distance between the plane of the central line and the top end surface of the probe head (1) is 0.5-1 mm, the axial spacing distance between the adjacent and different axially positioned convective heat transfer holes (3) is 0.6-4 mm, the diameter of the circular channel of the head of the temperature sensor (2) is 0.8-3.5 mm, the length of the circular channel is 2-12 mm along the axial direction, the axis of the circular channel, the distance between the central axis of the temperature sensor cable leading-out channel (5) and the central axis of the cylinder is 0.7-3 mm, the central axis of the temperature sensor cable leading-out channel (5), the central axis of the cylinder and the central axis of the pressure measuring mesopore (6) are on the same plane, the head of the temperature sensor (2) is positioned on the intersection point of the axis of the circular temperature sensor cable leading-out channel (5) and the central axis of the pressure measuring mesopore (6), the temperature sensor (2) is fixed through a heat insulation sealing element (4), the temperature sensor cable (14) leads out the tail of the probe supporting rod (12) through the temperature sensor cable leading-out channel (5) in the probe, and the cylindrical axis of the probe head (1) is coincided;
before measurement, calibrating the probe of the invention through a calibration wind tunnel to obtain a probe calibration curve; in actual measurement, based on data measured by five pressure measuring holes of the probe and the temperature sensor (2), the total temperature, the total pressure, the static temperature, the static pressure, the Mach number, the pitch angle, the deflection angle, the speed and the density of a measured transonic three-dimensional flow field can be measured simultaneously through data processing according to a calibration coefficient curve and a formula obtained through calibration; according to the invention, the temperature sensor (2) is back to the main stream, and the layout and the structural design of six circular convection heat exchange holes (3) are formed on the leeward side of the probe head (1), so that the service life of the temperature sensor (2) is effectively prolonged; the spatial resolution of the probe is improved; the convective heat transfer between the air flow and the temperature sensor (2) is enhanced, and the measurement precision is improved.
CN202010068029.9A 2020-01-20 2020-01-20 Probe for measuring whole parameters of transonic three-dimensional steady-state flow field Pending CN111089704A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380667A (en) * 2020-05-06 2020-07-07 中国空气动力研究与发展中心超高速空气动力研究所 Device for reducing scouring damage of hypersonic wind tunnel tail gas to test model sensor
CN114876842A (en) * 2022-04-29 2022-08-09 沈阳鼓风机集团股份有限公司 Three-dimensional flow field measuring method
CN115435930A (en) * 2022-07-29 2022-12-06 北京航空航天大学 Three-dimensional full-parameter high-frequency probe for measuring interstage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380667A (en) * 2020-05-06 2020-07-07 中国空气动力研究与发展中心超高速空气动力研究所 Device for reducing scouring damage of hypersonic wind tunnel tail gas to test model sensor
CN111380667B (en) * 2020-05-06 2024-05-28 中国空气动力研究与发展中心超高速空气动力研究所 Device for reducing scouring damage of hypersonic wind tunnel tail gas to test model sensor
CN114876842A (en) * 2022-04-29 2022-08-09 沈阳鼓风机集团股份有限公司 Three-dimensional flow field measuring method
CN115435930A (en) * 2022-07-29 2022-12-06 北京航空航天大学 Three-dimensional full-parameter high-frequency probe for measuring interstage

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