阅读说明：本技术 一种基于尾缘吹气形式的高速风洞阵风发生装置 (High-speed wind tunnel gust generating device based on trailing edge blowing form ) 是由 张颖 刘南 郭承鹏 金福旭 刘昱 王冬 杨希明 于 2021-06-23 设计创作，主要内容包括：本发明提供一种基于尾缘吹气形式的高速风洞阵风发生装置,包括：翼型左侧壁板、翼型右侧壁板、上端板、下端板、调节开关、联轴器、驱动电机和供气管路,翼型左侧壁板、翼型右侧壁板、上端板、下端板分别连接在一起组成翼型壳体,在翼型壳体的内部延弦向分别有开稳压腔和调节腔,稳压腔和调节腔互相连通,在翼型壳体的尾缘处开有射流孔道,射流孔道与调节腔连接,通过射流孔道的切向吹气,从而产生垂直方向阵风；调节腔内安装有调节开关,通过控制调节开关的旋转度能够调节射流孔道的流量。本装置便于与风洞连接,没有惯性载荷；控制形式简单,可以产生较宽频率范围和形式多样的阵风场,以实现对大气中阵风扰动的合理模拟。(The invention provides a high-speed wind tunnel gust generating device based on a trailing edge blowing form, which comprises: the wing-shaped shell comprises a wing-shaped left side wall plate, a wing-shaped right side wall plate, an upper end plate, a lower end plate, an adjusting switch, a coupler, a driving motor and an air supply pipeline, wherein the wing-shaped left side wall plate, the wing-shaped right side wall plate, the upper end plate and the lower end plate are respectively connected together to form a wing-shaped shell; the adjusting cavity is internally provided with an adjusting switch, and the flow of the jet flow pore passage can be adjusted by controlling the rotation degree of the adjusting switch. The device is convenient to be connected with the wind tunnel, and has no inertial load; the control form is simple, and the gust wind field with a wide frequency range and various forms can be generated, so that the reasonable simulation of gust wind disturbance in the atmosphere is realized.)

1. A high-speed wind tunnel gust generating device based on a trailing edge blowing form comprises: wing section left side wallboard, wing section right side wallboard, upper end plate, lower end plate, regulating switch, shaft coupling, driving motor and air supply line, wing section left side wallboard and wing section right side wallboard link together, both ends are connected and then constitute wing section casing with upper end plate and lower end plate respectively about it, driving motor and air supply line are located upper end plate side, its characterized in that: the inner part of the wing-shaped shell is provided with a voltage stabilizing cavity and an adjusting cavity along the chord direction, the voltage stabilizing cavity and the adjusting cavity are communicated with each other, the voltage stabilizing cavity and the adjusting cavity are respectively communicated with the upper end and the lower end of the wing-shaped shell, the tail edge of the wing-shaped shell is provided with a jet flow pore passage with the diameter not more than 2 mm, the jet flow pore passage is connected with the adjusting cavity, one end of an air supply pipeline is connected with the voltage stabilizing cavity, the other end of the air supply pipeline is connected with an external source for supplying air to the gust generating device, air is blown tangentially through the jet flow pore passage so as to generate gust in the vertical direction, an adjusting switch is arranged in the adjusting cavity, the shaft necks of the upper end shaft and the lower end shaft of the adjusting switch are respectively connected with the upper end plate and the lower end plate through bearings, the upper end shaft of the adjusting switch is connected with an output shaft of a driving motor through a coupler, and the flow of the jet flow passage can be adjusted through controlling the rotation of the adjusting switch.

2. The high-speed wind tunnel gust generation device based on the trailing edge blowing form according to claim 1, characterized in that: the cross section of the adjusting switch is elliptical, the cross section of the adjusting cavity is also approximately elliptical, the two ellipses are located in the same center, the length of the long axis of the elliptical cross section of the adjusting switch is matched with the length of the short axis of the elliptical cross section of the adjusting cavity, and the adjusting switch rotates to a vertical angle to separate the space in the adjusting cavity into two parts.

3. The high-speed wind tunnel gust generation device based on the trailing edge blowing form according to claim 2, characterized in that: the cross section of the pressure stabilizing cavity is rectangular.

4. The high-speed wind tunnel gust generation device based on the trailing edge blowing form according to claim 1, characterized in that: the upper end plate outside install the axle sleeve board, sealed to the rotating shaft department of stretching out and the department that stretches out of air supply line.

5. The high-speed wind tunnel gust generation device based on the trailing edge blowing mode as claimed in any one of claims 1 to 4, wherein: the rotation mode of the driving motor is controlled through the motor control system, so that the adjusting switch can move according to a specified rule, the flow of a jet flow pore passage at the tail edge is controlled to change along with time, and a periodic gust wind field is generated.

Technical Field

The invention belongs to the technical field of aerodynamic wind tunnel tests, and particularly relates to a high-speed wind tunnel gust generation device based on a trailing edge blowing mode.

Background

Modern large aircraft, such as military and civil transport plane, high-altitude long-endurance unmanned aerial vehicle, long-distance bomber, etc., in order to pursue higher aerodynamic efficiency and lower structural weight, generally adopt high aspect ratio wing, use combined material in a large number on the structural material, the aircraft has great flexibility, this makes the gust problem of transonic speed flight stage prominent day by day, gust load, especially the gust load of vertical direction, probably become the most serious condition of flight load, therefore need carry out gust load prediction and gust and slow down initiative control technology research at aircraft design stage. The development of the researches needs to depend on the construction of a large gust test system of the high-speed wind tunnel.

Accurate prediction of gust loads is an important task that must be performed in modern aircraft design, and gust testing is an important means for doing so. The gust generating device is an essential important component in the construction of a gust test system. Based on the above situation, a high-speed wind tunnel gust generating device based on a trailing edge blowing mode is needed.

Disclosure of Invention

Based on the defects, the invention provides the high-speed wind tunnel gust generating device based on the trailing edge blowing form, and the gust generating device is vertically arranged at the inlet section of the spray pipe and used for generating controllable and adjustable periodic gust disturbance in a gust test.

The technical scheme adopted by the invention is as follows: a high-speed wind tunnel gust generating device based on a trailing edge blowing form comprises: the wing-shaped wind generating device comprises a wing-shaped left side wall plate, a wing-shaped right side wall plate, an upper end plate, a lower end plate, an adjusting switch, a rotating shaft, a coupler, a driving motor and an air supply pipeline, wherein the driving motor is connected with the rotating shaft through the coupler, the wing-shaped left side wall plate and the wing-shaped right side wall plate are connected together, the upper end and the lower end of the wing-shaped left side wall plate are respectively connected with the upper end plate and the lower end plate to form a wing-shaped shell, the driving motor and the air supply pipeline are positioned on the side of the upper end plate, a voltage stabilizing cavity and an adjusting cavity are respectively formed in the wing-shaped shell along the chord direction, the voltage stabilizing cavity and the adjusting cavity are mutually communicated, the voltage stabilizing cavity and the adjusting cavity are respectively communicated with the upper end and the lower end of the wing-shaped shell, a jet flow pore with the diameter of not more than 2 mm is formed in the tail edge of the wing-shaped shell, the jet flow pore is connected with the adjusting cavity, one end of the air supply pipeline is connected with air supply to realize the external source wind generating device, blowing air tangentially through the jet flow pore passage to generate vertical gust; the regulating switch is arranged in the regulating cavity, the shaft necks of the upper end shaft and the lower end shaft of the regulating switch are respectively connected with the upper end plate and the lower end plate through bearings, the upper end shaft of the regulating switch is connected with the output shaft of the driving motor through a coupler, and the flow of the jet flow pore passage can be regulated by controlling the rotation degree of the regulating switch.

The invention also has the following technical characteristics:

1. the cross section of the adjusting switch is elliptical, the cross section of the adjusting cavity is also approximately elliptical, the two ellipses are located in the same center, the length of the long axis of the elliptical cross section of the adjusting switch is matched with the length of the short axis of the elliptical cross section of the adjusting cavity, and the adjusting switch rotates to a vertical angle to separate the space in the adjusting cavity into two parts.

2. The cross section of the pressure stabilizing cavity is rectangular.

3. The upper end plate outside install the axle sleeve board, sealed to the rotating shaft department of stretching out and the department that stretches out of air supply line.

4. The rotation mode of the driving motor is controlled through the motor control system, so that the adjusting switch can move according to a specified rule, the flow of a jet flow pore passage at the tail edge is controlled to change along with time, and a periodic gust wind field is generated.

The invention has the advantages and beneficial effects that: the device is convenient to be connected with the wind tunnel, and has no inertial load; the control mode is simple, and the gust wind field with a wide frequency range and various modes can be generated, so that reasonable simulation of gust disturbance in the atmosphere is realized, and powerful equipment support is provided for a high-speed gust load prediction test, particularly a gust load alleviation active control method design verification research test. The basic principle of the method for generating the gust is that the coanda effect of the wake edge circumfluence is utilized, the circumferential quantity control is carried out by tangential blowing near the wake edge, so that the airflow originally departing from the original flowing direction is changed into the trend of flowing along the surface of a convex object, namely, the wall attachment effect is generated, and the gust in the vertical direction is generated.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic diagram showing the adjustment of the jet intensity at the air blowing hole at the trailing edge.

The specific implementation mode is as follows:

the invention is further illustrated by way of example in the accompanying drawings of the specification:

example 1

A high-speed wind tunnel gust generating device based on the trailing edge blowing form is vertically arranged at the inlet section of a spray pipe and comprises: the jet nozzle comprises a wing-shaped left side wall plate 1, a wing-shaped right side wall plate 2, an upper end plate 3, a lower end plate 4, an adjusting switch 5, a coupler 8, a driving motor 10 and an air supply pipeline 11, wherein the driving motor 10 is fixed on the outer side wall of the jet pipe through a motor mounting plate 9, the wing-shaped left side wall plate 1 and the wing-shaped right side wall plate 2 are connected together through screws, the upper end and the lower end of the wing-shaped left side wall plate are respectively connected with the upper end plate 3 and the lower end plate 4 through screws to form a wing-shaped shell, a sealing gasket is added in the middle of the wing-shaped shell for sealing, the driving motor 10 and the air supply pipeline 11 are positioned on the side of the upper end plate 3, a pressure stabilizing cavity 12 and an adjusting cavity 13 are respectively arranged inside the wing-shaped shell along the chord direction, the pressure stabilizing cavity 12 and the adjusting cavity 13 are respectively communicated with the upper end and the lower end of the wing-shaped shell, a jet flow pore 14 with the diameter not more than 2 mm is arranged at the tail edge of the wing-shaped shell, and the jet flow pore 14 is connected with the adjusting cavity 13, one end of the air supply pipeline 11 is connected with the pressure stabilizing cavity 12, and the other end of the air supply pipeline is connected with a pressure source in the wind tunnel, so that air supply to the gust generating device is realized, and tangential air blowing is performed through the jet flow pore passage 14, and thus, vertical gust is generated; an adjusting switch 5 is arranged in the adjusting cavity 13, the shaft necks of the upper end shaft and the lower end shaft of the adjusting switch 5 are respectively connected with the upper end plate and the lower end plate through bearings, the upper end shaft 6 of the adjusting switch 5 is connected with the output shaft of the driving motor through a coupler 8, and the flow of the jet flow pore passage 14 can be adjusted by controlling the rotation degree of the adjusting switch 5. The cross section of the adjusting switch 5 is an ellipse, the cross section of the adjusting cavity 13 is also approximate to an ellipse, the two ellipses are positioned in the same center, the length of the long axis of the ellipse of the cross section of the adjusting switch 5 is matched with the length of the short axis of the ellipse of the cross section of the adjusting cavity, and the adjusting switch 5 is rotated to a vertical angle to separate the space of the adjusting cavity 13 into two parts. The cross section of the pressure stabilizing cavity 12 is rectangular. And a shaft cover plate 7 is arranged on the outer side of the upper end plate 3, and the extending part of the upper end shaft 6 of the adjusting switch 5 and the extending part of the air supply pipeline 11 are sealed. The rotation mode of the driving motor 10 is controlled by the motor control system, so that the adjusting switch 5 moves according to a specified rule, the purpose of controlling the flow of the jet flow duct 14 at the tail edge to change along with time is achieved, and finally, the generation of a periodic gust wind field is achieved. The profile of the wing-shaped shell ensures that the airflow does not separate when flowing through the gust generator, and on the other hand, ensures that the height and the direction of the trailing edge jet flow pore passage 14 are reasonable, and can generate a coanda effect at the trailing edge so as to generate gust in the vertical direction. Meanwhile, the lower surface point of the jet flow duct 14, the cutting point of the rear edge of the lower surface of the airfoil profile and the tangent line of the cutting point are taken as constraint circles to carry out shape modification design on the tail edge.

The high-pressure airflow with stable pressure generates jet flow with periodically changed strength near the trailing edge through the periodic rotary motion of the regulating switch 5, thereby achieving the purpose of generating a periodically changed gust wind field. When the adjusting switch 5 is in the vertical position, as shown in fig. 2(a), the jet intensity at the jet duct 14 at the trailing edge is minimum, the streaming effect generated by the airflow at the trailing edge is weak, and the corresponding velocity in the vertical direction is small; as shown in fig. 2(b), when the regulating switch 5 is in a horizontal position, the jet intensity at the jet duct 14 at the trailing edge is the greatest, and the airflow generates a significant deflection effect at the trailing edge, so that a large vertical gust speed is generated.