Pneumatic and infrared comprehensive design method for low-detectability large-curvature spray pipe

A comprehensive design, large curvature technology, used in jet propulsion, sustainable transportation, machines/engines, etc., to reduce nozzle wall temperature, improve infrared suppression performance, and reduce nozzle curvature.

Pending Publication Date: 2022-08-02
AECC SHENYANG ENGINE RES INST
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The aerodynamic and infrared performance are only related to the geometric parameters. A relatively simple correlation model will inevitably lead to the sacrifice of a part of the aerodynamic performance or infrared radiation performance, and it is impossible to fully balance the two performances.

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
  • Pneumatic and infrared comprehensive design method for low-detectability large-curvature spray pipe
  • Pneumatic and infrared comprehensive design method for low-detectability large-curvature spray pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] In order to make the objectives, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present...

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

No PUM Login to view more

Abstract

The invention belongs to the field of aero-engines, and particularly relates to a pneumatic and infrared comprehensive design method for a low-detectable large-curvature spray pipe, which comprises the following steps: S1, selecting a characteristic section of the spray pipe; determining pneumatic profile parameters based on a nozzle pneumatic flow path design method; s2, obtaining a first geometric shielding profile meeting a preset infrared radiation suppression requirement on the basis of a rear-view shielding design requirement; s3, the geometric shielding molded surface is corrected through a secondary flow injection cooling means, a second geometric shielding molded surface is obtained, and meanwhile a first gas film molded surface is obtained; and S4, engine outer culvert air entraining parameters are obtained, the first air film molded surface is corrected through the engine outer culvert air entraining parameters, a second air film molded surface is obtained, and the infrared suppression performance of the spray pipe is improved by reducing the curvature of the spray pipe, reducing the thrust performance loss of the spray pipe and reducing the wall temperature of the spray pipe.

Description

technical field [0001] The application belongs to the field of aero-engines, and in particular relates to a low-detectable and large-curvature nozzle integrated aerodynamic and infrared design method. Background technique [0002] When designing an exhaust system, aerodynamic design goals and infrared design goals are often contradictory. In order to balance the two, when designing the exhaust system, it is necessary to minimize the change of the airflow direction of the exhaust system, that is, to minimize the curvature of the exhaust system, thereby reducing the local loss of airflow along the way. The smaller curvature of the exhaust system has a limited shielding effect on the high-temperature components at the front end, and the suppression effect on the infrared radiation intensity is small. The exhaust system with larger curvature has obvious effect on the inhibition of infrared radiation intensity, but the negative effect on the aerodynamic performance is also obvio...

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
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/82
CPCF02K1/82F02K1/825Y02T90/00
Inventor 刘帅金文栋周莉史经纬
Owner AECC SHENYANG ENGINE RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap