Transient impact type high-speed wind tunnel low supersonic velocity flow field testing method and spray pipe devices thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A supersonic flow and high-speed wind tunnel technology, applied in the field of wind tunnel testing, can solve problems such as subsonic flow field is not very ideal, the calibration test results are not achieved, and no systematic test research has been carried out.
Pending Publication Date: 2020-01-17
AVIC SHENYANG AERODYNAMICS RES INST
View PDF0 Cites 20 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The FL-1 wind tunnel has carried out the research and debugging of the low supersonic flow field using the M1.35 nozzle and the hole wall test section, but the quality of the low supersonic flow field established by it does not meet the test requirements. There has not been a relatively systematic test and research work on the impulsive hyposonic speed, and the established low supersonic flow field is not very ideal, and the result of the flow field M number distribution calibration does not meet the national military standard σM≤0.011. Therefore, the use of Whether the ideal hyposonic flow field can be realized under the combined state of the nozzle and the hole wall test section, and whether the quality of the established hyposonic flow field can meet the test requirements have yet to be resolved.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach 1
[0047] A test method for low supersonic flow field in a temporary high-speed wind tunnel, comprising the following steps:
[0048] Step a, using the newly designed M1.3, M1.35 and M1.4 nozzle devices and combining the opening wall test section to establish a low supersonic flow field in the transient wind tunnel;
[0049] In step b, the ideal flow field control quality is obtained by using the Mach number control method;
[0050] Step c, through the analysis of the axial Mach number distribution of the test section at different flare angles, it is determined that the smaller the flare angle of the test section is, the better the uniformity of the flow field is at low supersonic speeds, and the flare angle of 0° is selected as the cave condition ;
[0051] Step d, using the nozzle device combined with the test section of the hole wall, adopting the expansion angle of the test section and the flow field control method to obtain a qualified flow field that meets the requirements...
specific Embodiment approach 2
[0088] A kind of nozzle device designed in the test method of a kind of transient high-speed wind tunnel hyposonic flow field based on the specific embodiment one, such as figure 1 As shown, it includes nozzle flex plate 1, support 2, frame 3, front end plate 4, sliding end 5, driver 6, rear end plate 7 and main housing 8; the front end plate 4, rear end plate 7 and The main housing 8 constitutes a hollow quadrangular shell, the upper end of the quadrangular shell is provided with several racks 3, the lower end of the quadrangular shell is provided with several supports 2, and the aerodynamic profile of the flexible plate 1 of the nozzle It is a curved nozzle aerodynamic profile, the left and right ends of the sliding end 5 are fixed between the front end plate 4 and the rear end plate 7, the upper surface aerodynamic profile of the nozzle flex plate 1 and the lower surface aerodynamic profile Several drivers 6 are arranged on each surface, and the several drivers 6 can change...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention discloses a transient impact type high-speed wind tunnel low supersonic velocity flow field testing method and spray pipe devices thereof, which belong to the technical field of wind tunnel tests. In the prior art, an ideal low supersonic velocity flow field cannot be realized, and test requirements cannot be met. The transient impact type high-speed wind tunnel low supersonic velocity flow field testing method utilizes the newly designed M1.3, M1.35 and M1.4 spray pipe devices combined with an aperture wall test section to establish a low supersonic velocity flow field in a transient impact wind tunnel, and adopts a Mach number control method to obtain ideal flow field control quality; through the analysis of the axial Mach number distribution of the test section at different expansion angles, the method determines that the smaller the expansion angle of the test section at low supersonic speed, the better the uniformity of the flow field, and the expansion angle of 0 degree is selected as a tunnel body condition; the nozzle devices are combined with the aperture wall test section, and a test section expansion angle and flow field control mode is used to obtain a qualified flow field that meets the requirements of the national military standard; the ideal low supersonic velocity flow field and the test requirements are achieved; and a hardware basis is provided for realizing the ideal low supersonic velocity flow field and meeting test requirements by adopting spray pipe aerodynamic profiles of the M1.3, M1.35 and M1.4.
Description
technical field [0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a test method for a low supersonic flow field in a temporary high-speed wind tunnel and a nozzle device thereof. Background technique [0002] Temporary wind tunnels generally do not have low supersonic test capabilities. The FL-1 wind tunnel has carried out the research and debugging of the low supersonic flow field using the M1.35 nozzle and the hole wall test section, but the quality of the low supersonic flow field established by it does not meet the test requirements. There has not been a relatively systematic test and research work on the impulsive hyposonic speed, and the established low supersonic flow field is not very ideal, and the result of the flow field M number distribution calibration does not meet the national military standard σM≤0.011. Therefore, the use of Whether the ideal hyposonic flow field can be realized under the combined state of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more