CN-121247085-B - Double-layer nested active turbulence grid system

CN121247085BCN 121247085 BCN121247085 BCN 121247085BCN-121247085-B

Abstract

The invention discloses a double-layer nested active turbulence grid system which comprises double-layer nested grid fins, a grid fin angle adjusting device, a grid frame and a master controller. The double-layer nested grille flap is formed by nesting an inner grille flap and an outer grille flap in a coaxial manner. The grid fin angle adjusting device comprises an inner grid fin angle adjusting device and an outer grid fin angle adjusting device, and the outer grid fin angle adjusting device is fixedly connected with the inner grid fin angle adjusting device through a motor connecting piece. The inner and outer grid wing panel angle adjusting devices are all in communication connection with the master controller and are used for respectively adjusting the relative angles between the inner grid wing panel and the outer grid wing panel and the integral angles of the double-layer nested grid wing panels. The coordination control of the inner grid wing plate and the outer grid wing plate can be realized through the master controller, so that the blocking degree of the grid can be continuously and real-time adjusted, the grid wing plate does not need to be manually replaced, and the flexibility, the control precision and the test efficiency of turbulence generation are obviously improved.

Inventors

LIU ZHIFENG
YANG SHUO
ZENG ZHIHAO

Assignees

航升科技有限公司

Dates

Publication Date: 20260512
Application Date: 20251104

Claims (9)

1. The double-layer nested active turbulence grid system is characterized by comprising a master controller, a grid frame, n rows and m columns of double-layer nested grid fins which are arranged in the grid frame in a transverse and vertical crossed manner, and grid fin angle adjusting devices which are arranged outside the grid frame and respectively correspond to the double-layer nested grid fins in each row and each column one by one, wherein n and m are positive integers which are not less than 5; the grid fin angle adjusting device comprises an inner grid fin angle adjusting device and an outer grid fin angle adjusting device which is fixedly connected with the inner grid fin angle adjusting device through a motor connecting piece, and the inner grid fin angle adjusting device and the outer grid fin angle adjusting device are both in communication connection with the master controller; The double-layer nested grid fins comprise outer grid fins and inner grid fins coaxially nested in the outer grid fins, the inner grid fins in the same row/column are connected with the corresponding inner grid fin angle adjusting devices through the same inner layer fin shaft, and the outer grid fins in the same row/column are connected with the corresponding outer grid fin angle adjusting devices through the same outer layer fin shaft; The master controller controls the angle adjusting devices of the inner grille wing pieces to drive the inner grille wing pieces to rotate a target angle relative to the outer grille wing pieces in a target direction through the inner layer wing piece shafts; The main controller controls the angle adjusting device of each outer grille wing panel based on a control strategy, drives each outer grille wing panel through each outer grille wing panel shaft, and drives each inner grille wing panel to rotate according to a rotation mode corresponding to the control strategy through each motor connecting piece; The outer grille wing panel angle adjusting device comprises a rotating motor, a first coupler and a motor support frame, and the inner grille wing panel angle adjusting device comprises an angle motor, a second coupler, a slip ring and a slip ring support frame; The motor support frame is fixedly arranged outside the grid frame, the rotating motor is fixedly arranged outside the motor support frame, a driving shaft of the rotating motor is a hollow shaft, one end of the driving shaft is fixedly connected with the outer wing panel shaft through the first coupling, the other end of the driving shaft is fixedly connected with the angle motor through the motor connecting piece, and the input end of the rotating motor is connected with the main controller; The outer-layer wing shaft is a hollow shaft, the inner-layer wing shaft penetrates through the outer-layer wing shaft and is connected with an output shaft of the angle motor through the second coupler arranged inside the motor connecting piece, an input end of the angle motor is connected with one end of the slip ring penetrating through the slip ring support frame, the other end of the slip ring is connected with the main controller, and the slip ring support frame is fixedly installed on the motor support frame.
2. The dual nested active turbulence grill system of claim 1, wherein said outer grill fin angle adjustment means further comprises a swivel bearing and a retainer ring; the rotary bearing is sleeved on the periphery of the outer-layer wing shaft, and the retainer ring compresses the rotary bearing outside the grid frame.
3. The dual nested active turbulence grill system of claim 1, further comprising a rotary motor driver and an angular motor driver; the input end of the rotating motor is connected with the main controller through the rotating motor driver, and the other end of the slip ring is connected with the main controller through the angle motor driver.
4. The dual nested active turbulence grill system of claim 1, wherein, And inner layer wing shaft holes which are communicated with each other are arranged between the inner grid wings in the same row/column, and each inner grid wing is fixedly connected with an inner layer wing shaft arranged in the inner layer wing shaft hole.
5. The dual nested active turbulence grill system of claim 1, wherein, When the rotation mode is a fixed speed mode, the master controller sends each first outer grille wing piece rotation instruction to each corresponding outer grille wing piece angle adjusting device, wherein the first outer grille wing piece rotation instruction comprises a first initial direction, a first rotation speed and a first rotation interval time, and the first rotation speeds included by each first outer grille wing piece rotation instruction are the same; for each outer grille wing piece angle adjusting device, the outer grille wing piece angle adjusting device receives a corresponding first outer grille wing piece rotating instruction, drives each outer grille wing piece connected with the outer grille wing piece angle adjusting device and each inner grille wing piece nested in each outer grille wing piece to rotate towards the first initial direction at the first rotating speed, and changes direction according to the first rotating interval time.
6. The dual nested active turbulence grill system of claim 1, wherein, When the rotation mode is a time single random mode, the master controller sends each second outer grille wing piece rotation instruction to each corresponding outer grille wing piece angle adjusting device, wherein the second outer grille wing piece rotation instruction comprises a second initial direction, a second rotation speed and a first rotation interval time change condition, and the second rotation speeds included by each second outer grille wing piece rotation instruction are the same; And aiming at each outer grille wing piece angle adjusting device, the outer grille wing piece angle adjusting device receives a corresponding second outer grille wing piece rotating instruction, drives each outer grille wing piece connected with the outer grille wing piece angle adjusting device and each inner grille wing piece nested in each outer grille wing piece to rotate towards the second initial direction at the second rotating speed, and changes direction according to the rotating interval time corresponding to the first rotating interval time changing condition.
7. The dual nested active turbulence grill system of claim 1, wherein, When the rotation mode is a speed single random mode, the master controller sends each third outer grille wing piece rotation instruction to each corresponding outer grille wing piece angle adjusting device, wherein the third outer grille wing piece rotation instruction comprises a third initial direction, a second rotation interval time and a first rotation speed change condition, and the second rotation interval time included by each third outer grille wing piece rotation instruction is the same; And aiming at each outer grille wing piece angle adjusting device, the outer grille wing piece angle adjusting device receives a corresponding third outer grille wing piece rotating instruction, drives each outer grille wing piece connected with the outer grille wing piece angle adjusting device and each inner grille wing piece nested in each outer grille wing piece to rotate towards the third initial direction at the rotating speed corresponding to the first rotating speed changing condition, and changes direction according to the second rotating interval time.
8. The dual nested active turbulence grill system of claim 1, wherein, When the rotation mode is a double random mode, the master controller sends rotation instructions of all the fourth outer grille wings to corresponding outer grille wing angle adjusting devices, wherein the rotation instructions of all the fourth outer grille wings comprise a fourth initial direction, a second rotation interval time change condition and a second rotation speed change condition; For each outer grille wing piece angle adjusting device, the outer grille wing piece angle adjusting device receives a corresponding fourth outer grille wing piece rotating instruction, drives each outer grille wing piece connected with the outer grille wing piece angle adjusting device and each inner grille wing piece nested in each outer grille wing piece to rotate towards the fourth initial direction at a rotating speed corresponding to the second rotating speed changing condition, and changes direction according to the rotating interval time corresponding to the second rotating interval time changing condition.
9. The dual nested active turbulence grid system of claim 1, wherein the target angle is in the range of 0-90 °.

Description

Double-layer nested active turbulence grid system Technical Field The invention relates to the technical field of turbulence grids, in particular to a double-layer nested active turbulence grid system. Background The method for reconstructing the flow environment of the aircraft in the aviation wind tunnel and monitoring aerodynamic force, control stability, maneuverability and other indexes of the aircraft is one of important steps for designing, optimizing and evaluating the aircraft. Typical aviation wind tunnels can be used to generate low-turbulence uniform flow fields. However, in low-altitude flight environments within the near-ground atmosphere boundary layer, complex wind conditions such as turbulence, wind shear, and gusts often exist. In order to reproduce this typical low-altitude airspace flight environment in an aviation wind tunnel, the existing method is implemented by an active turbulence grid technology. Fig. 1 (a) shows a schematic diagram of the working principle of an active turbulence grid, fig. 1 (b) shows a schematic diagram of 3 typical grid fin forms of the active turbulence grid, namely a non-through hole form, a circular through hole form and a triangular through hole form, wherein the grid fin forms generally adopt plane solid slices. Through the evenly incoming flow coupling of the motor-driven horizontal and vertical distributed vane groups and the wind tunnel test section, a fully developed turbulent wind environment can be generated, or wind shear, gust and wind conditions simulating an atmospheric boundary layer can be constructed. The incoming flow direction is generally perpendicular to the plane of the grille, i.e., perpendicular to the plane of the paper in fig. 1 (a). As shown in the third grille vane of fig. 1 (b), by forming triangular through holes in the grille vane and controlling the ratio of the area of the through holes to the area of the appearance of the grille vane, the blocking degree of the active grille relative to the incoming flow can be adjusted, thereby modulating the turbulence intensity and integral scale of the flow field generated by the active grille. Therefore, the turbulence intensity and the integral scale of the flow field generated by the active grating are regulated and controlled by controlling the ratio of the area of the through holes to the area of the grating wing pieces, however, the method has the defects that if the ratio of the area of the through holes to the area of the grating wing pieces is to be changed, the grating wing pieces with different through holes are required to be manually replaced, the real-time continuous regulation and control of the turbulence field cannot be realized, and the efficiency is low. Disclosure of Invention The invention provides a double-layer nested active turbulence grid system, which can realize real-time continuous regulation and control of a turbulence field and improve efficiency. The specific technical scheme is as follows. The invention provides a double-layer nested active turbulence grid system, which comprises a master controller, a grid frame, n rows and m columns of double-layer nested grid fins which are arranged in the grid frame in a transverse and vertical crossed manner, and grid fin angle adjusting devices which are arranged outside the grid frame and respectively correspond to the double-layer nested grid fins of each row and each column one by one, wherein n and m are positive integers not less than 5; the grid fin angle adjusting device comprises an inner grid fin angle adjusting device and an outer grid fin angle adjusting device which is fixedly connected with the inner grid fin angle adjusting device through a motor connecting piece, and the inner grid fin angle adjusting device and the outer grid fin angle adjusting device are both in communication connection with the master controller; The double-layer nested grid fins comprise outer grid fins and inner grid fins coaxially nested in the outer grid fins, the inner grid fins in the same row/column are connected with the corresponding inner grid fin angle adjusting devices through the same inner layer fin shaft, and the outer grid fins in the same row/column are connected with the corresponding outer grid fin angle adjusting devices through the same outer layer fin shaft; The master controller controls the angle adjusting devices of the inner grille wing pieces to drive the inner grille wing pieces to rotate a target angle relative to the outer grille wing pieces in a target direction through the inner layer wing piece shafts; The main controller controls the angle adjusting device of each outer grille wing piece based on a control strategy, drives each outer grille wing piece through each outer grille wing piece shaft, and drives each inner grille wing piece to rotate according to a rotation mode corresponding to the control strategy through each motor connecting piece. Optionally, the outer grille vane angle adjusting devic