Passive condition start-up vortex generator and working method thereof
A vortex generator and conditional start technology, applied to aircraft parts, by generating vortices and affecting the air flow through the surface of the aircraft, etc., it can solve the problems of increased aircraft cruise flight, inapplicability to non-design conditions, etc., and achieve reverse pressure. The effect of delaying the formation of gradients and increasing the energy of the flow field
Inactive Publication Date: 2019-12-24
HARBIN ENG UNIV
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, ordinary uncontrollable passive vortex generators are only installed on the suction side of the airfoil, which adds about 5% of the aerodynamic resistance to the cruising flight of the aircraft, and has no standby time. It works all the time and is not suitable for non-design conditions.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The present invention will be further described below in conjunction with the accompanying drawings.
[0016] In the figure: 1-airfoil, 2-first streamlined sheet, 3-second streamlined sheet, 4-third streamlined sheet;
[0017] A passive conditionally activated vortex generator comprises an airfoil (1) and several streamlined slices. Among them, the streamlined sheets are arranged in a staggered manner, and the adjacent streamlined sheets are in the shape of "eight". The streamlined sheet is fixed on the leading edge surface of the airfoil at a suitable installation angle, and its specific size, shape and installation position can be set according to the specific application environment, and it will produce a wing tip with relatively high vortex strength under certain conditions eddy.
[0018] When the airfoil (1) is in the state of zero angle of attack, the vortex generator hardly works, so basically no additional resistance will be generated; and when the airfoil (1)...
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 belongs to the field of flight control equipment and specifically relates to a passive condition start-up vortex generator and a working method thereof. The passive condition start-up vortex generator consists of a plurality of streamline-shaped thin sheets; the streamline-shaped thin sheets are fixed on the surface of the leading edge of a airfoil profile in a welded manner; the streamline-shaped thin sheets are arranged in a crossed manner; and the adjacent streamline-shaped thin sheets are arranged in a splayed manner. According to the passive condition start-up vortex generator, the flow field energy of a bottom layer of a boundary layer can be increased at a high attack angle, large adverse pressure gradient can be stopped from forming and slowing the separation of the boundary layer, and moreover, large additional drag cannot be generated in a non-design state.
Description
technical field [0001] The invention belongs to the field of flight control equipment, and in particular relates to a passive conditionally activated vortex generator and a working method thereof. Background technique [0002] Some aerodynamic researchers studied the flow mechanism of vortex generators controlling the turbulent boundary layer of flat plates as early as the 1960s. The basic principle of the vortex generator to control the boundary layer, especially to control the separation of the turbulent boundary layer is to inject new vortex energy into the boundary layer. Next, aerodynamic researchers have done a lot of experimental research on the principle of vortex generators that control the separation of airfoil and wing turbulent boundary layers, including the shape, geometric parameters and installation positions of vortex generators, and their height and The early vortex generators with the same boundary layer thickness in the non-design state will produce addit...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B64C1/26B64C23/06
CPCB64C1/26B64C23/065Y02T50/10
Inventor 张佐天林健峰赵大刚郭春雨韩阳孙聪苏玉民王于钟若凡
Owner HARBIN ENG UNIV