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CN-122016223-A - Complex wind field generation system with cascade cooperative distributed control and complex wind field construction method

CN122016223ACN 122016223 ACN122016223 ACN 122016223ACN-122016223-A

Abstract

The invention discloses a complex wind field generation system and a complex wind field construction method for cascade collaborative distributed control, which belong to the technical field of wind tunnel test research, and comprise a wind tunnel body in a shape of a Chinese character 'hui', wherein the wind tunnel body comprises a first diffusion section, a first corner section, a second diffusion section, a second corner section, a first power system, a third diffusion section, a third corner section, a heat exchanger, a fourth corner section, a stabilizing section and a contraction section which are sequentially arranged; the outlet end of the contraction section is provided with a global complex wind field generating device capable of adjusting an airflow generating mode, airflow velocity, airflow jet direction, airflow swing frequency and airflow swing amplitude, and the inlet end of the first diffusion section is provided with a collector. The invention can superimpose unsteady complex wind fields on the basis of the uniform flow field of the conventional reflux low-speed wind tunnel, realize the complex flow field of the coupling of the flying speed and the unsteady wind fields, and is used for simulating the application scene that the aircraft passes through the complex wind field in the flying process.

Inventors

  • Xiao Zhenshan

Assignees

  • 肖祯山

Dates

Publication Date
20260512
Application Date
20251029

Claims (20)

  1. 1. The complex wind field generation system with the level string collaborative distributed control is characterized by comprising a wind tunnel body in a shape of a Chinese character 'hui', wherein the wind tunnel body comprises a first diffusion section (7), a first corner section (8), a second diffusion section (9), a second corner section (10), a first power system (12), a third diffusion section (13), a third corner section (14), a heat exchanger (16), a fourth corner section (18), a stabilizing section (19) and a contraction section (20) which are sequentially arranged, the outlet end of the contraction section (20) is provided with a global complex wind field generation device (1) capable of adjusting the generation mode, the flow velocity, the jet direction, the swing frequency and the swing amplitude of the airflow, the inlet end of the first diffusion section (7) is provided with a collector (3), and a space is reserved between the outlet end of the global complex wind field generation device (1) and the inlet end of the collector (3).
  2. 2. The complex wind field generation system controlled in a cascade cooperative distributed manner according to claim 1, wherein the global complex wind field generation device (1) comprises a second power system (1-2) and an omnidirectional rectangular spray pipe array (1-3) which are sequentially arranged at the outlet end of a contraction section (20), the omnidirectional rectangular spray pipe array (1-3) comprises spray pipe modules (1-3-1) which are distributed at the outlet end of the second power system (1-2), blades (1-3-2) which divide the interior of the spray pipe modules into a plurality of channels are arranged in the spray pipe modules (1-3-1), and the blades (1-3-2) can swing in the spray pipe modules (1-3-1).
  3. 3. The complex wind park generation system with coordinated distributed control of a stage string according to claim 2, characterized in that the global complex wind park generation device (1) further comprises a compensation section (1-1) connected between the contraction section (20) and the second power system (1-2).
  4. 4. The complex wind farm generating system with cooperative distributed control of a cascade according to claim 2, wherein the number of blades (1-3-2) in the nozzle module (1-3-1) is four, and the four blades (1-3-2) are arranged in a cross in the nozzle module (1-3-1).
  5. 5. The complex wind field generation system with coordinated distributed control of a cascade according to claim 2, characterized in that the cross section of the blades (1-3-2) is a flow-shaped airfoil.
  6. 6. A complex wind park generation system with coordinated distributed control of a stage string according to claim 3, characterized in that the second power system (1-2) comprises a fan array housing (1-2-1) connected at the outlet end of the compensation section (1-1) and a plurality of variable frequency axial flow fans (1-2-2) distributed inside the fan array housing (1-2-1).
  7. 7. The complex wind field generation system controlled in a cascade cooperative distributed manner according to claim 6, wherein a plurality of variable frequency axial flow fans (1-2-2) are arranged in a rectangular array at the outlet end of the compensation section (1-1), and a plurality of spray pipe modules (1-3-1) are arranged in a rectangular array at the outlet end of the plurality of variable frequency axial flow fans (1-2-2).
  8. 8. The complex wind farm generating system with cooperative distributed control of a cascade according to claim 6, wherein one of the nozzle modules (1-3-1) corresponds to four variable frequency axial flow fans (1-2-2).
  9. 9. The complex wind farm generating system with cooperative distributed control of a stage string according to claim 1, wherein a power segment front section (11) is further connected between the first power system (12) and the second corner section (10).
  10. 10. The complex wind field generation system controlled in a coordinated and distributed manner by a cascade according to claim 9, wherein the first power system (12) is one or more high-power variable-frequency axial-flow fans (1-2-2) distributed over the outlet end of the front section (11) of the power section.
  11. 11. The complex wind field generation system controlled in a cascade cooperative distributed mode according to claim 6 or 9, wherein the variable-frequency axial flow fan (1-2-2) comprises an air inlet cover (1-2-2-1), a supercharging section (1-2-2-5) and an exhaust cover (1-2-2-7) which are sequentially connected, a rectification hood (1-2-2-2) is arranged at the center of the air inlet cover (1-2-2-1), a rectification tail cover (1-2-2-6) is arranged in the exhaust cover (1-2-2-7), a variable-frequency motor is arranged in the rectification tail cover (1-2-2-6), a rotating impeller (1-2-2-3) is arranged at the output end of the variable-frequency motor, and a plurality of rotation stopping sheets (1-2-4) are uniformly distributed along the circumferential direction between the rectification tail cover (1-2-2-6) and the inner wall of the supercharging section (1-2-2-5).
  12. 12. The complex wind farm generating system of claim 11, wherein the inlet end of the inlet cowl (1-2-2-1) and the outlet end of the outlet cowl (1-2-2-7) are rectangular, and the outlet end of the inlet cowl (1-2-2-1) and the inlet end of the outlet cowl (1-2-2-7) are circular.
  13. 13. The complex wind farm generating system with cooperative distributed control of a stage train according to claim 11, wherein a side view of the fairing head (1-2-2-2), the booster stage (1-2-2-5) and the fairing tail (1-2-2-6) together form a streamlined airfoil.
  14. 14. The complex wind field generation system with the cooperative distributed control of the stage string according to claim 1, wherein a heat exchanger front section (15) is further connected between the heat exchanger (16) and the third corner section (14), and a heat exchanger rear section (17) is further connected between the heat exchanger (16) and the fourth corner section (18).
  15. 15. The complex wind field generation system with the cooperative distributed control of the stage string according to claim 1, wherein a honeycomb device and a damping net are installed in the stabilizing section (19), and corner guide sheets are arranged in the first corner section (8), the second corner section (10), the third corner section (14) and the fourth corner section (18).
  16. 16. A method for constructing a complex wind field under the cooperative distributed control of a stage string, comprising the complex wind field generating system under the cooperative distributed control of a stage string according to any one of claims 1 to 15, and further comprising the steps of: S1, determining a simulated flow field; S2, determining and adjusting the same-frequency operation frequency of variable-frequency axial flow fans (1-2-2) in a first power system (12) according to the determined simulated flow field characteristics, determining whether the universal complex wind field generating device (1) is installed or not, disassembling and assembling the variable-frequency axial flow fans, determining the operation mode and the operation frequency of a plurality of variable-frequency axial flow fans (1-2-2) in a second power system (1-2), adjusting the operation mode and the operation frequency, determining the blades (1-3-2) needing to swing in an omnidirectional rectangular spray pipe array (1-3) according to the determined simulated flow field characteristics, and determining the swing direction, the swing frequency and the swing amplitude of the blades (1-3-2), and adjusting the operation mode and the operation frequency.
  17. 17. The complex wind field construction method of the cascade cooperative distributed control according to claim 16, wherein the variable frequency axial flow fan (1-2-2) in the first power system (12) operates at the same frequency when the uniform stable flow field is simulated, the omnidirectional rectangular nozzle array (1-3) and the second power system (1-2) in the global complex wind field generation device (1) are removed, or the second power system (1-2) in the global complex wind field generation device (1) does not operate and the blades (1-3-2) in the omnidirectional rectangular nozzle array (1-3) do not swing.
  18. 18. The method for constructing the complex wind field with the cascade cooperative distributed control according to claim 16, wherein when the flying speed is overlapped with the shear wind field or the sudden flow is struck under the flying speed overlapped with the flying speed or the flow field simulation of the heat island wind field, the variable-frequency axial flow fans (1-2-2) in the first power system (12) run at the same frequency, the variable-frequency axial flow fans (1-2-2) in the second power system (1-2) are layered, the variable-frequency axial flow fans (1-2-2) in the same layer in the second power system (1-2) run at the same frequency, the variable-frequency axial flow fans (1-2-2) in different layers in the second power system (1-2) run at different frequencies, and the blades (1-3-2) horizontally arranged in each spray pipe module (1-3-1) are regulated to deflect, or the blades (1-3-2) vertically arranged in each spray pipe module (1-3-1) are regulated to deflect.
  19. 19. The method for constructing the complex wind field with the cascade cooperative distributed control according to claim 18, wherein when the flow field of the flying speed superposition shear wind field with different turbulence characteristics is simulated, the frequency of the variable-frequency axial flow fan (1-2-2) in the second power system (1-2) is regulated on the basis of the flow field simulation of the flying speed superposition shear wind field or the impinging storm or the heat island wind field under the flying speed superposition.
  20. 20. The complex wind field construction method for the cascade cooperative distributed control according to claim 18, wherein when the flow field of the flying speed superposition gust wind field is simulated, variable frequency axial flow fans (1-2-2) in the first power system (12) and the second power system (1-2) operate at the same frequency, and the blades (1-3-2) horizontally arranged in each spray pipe module (1-3-1) are adjusted to deflect at different frequencies and swing at different amplitudes, or the blades (1-3-2 vertically arranged in each spray pipe module (1-3-1) are adjusted to deflect at different frequencies and swing at different amplitudes.

Description

Complex wind field generation system with cascade cooperative distributed control and complex wind field construction method Technical Field The invention belongs to the technical field of wind tunnel test research, and particularly relates to a complex wind field generation system and a complex wind field construction method for cascade collaborative distributed control. Background The tangential wind, the crosswind, the gust, the downhill storm flow, the heat island wind field and the canyon wind field are common complex flow phenomena in the low-altitude atmosphere environment, and are characterized by high burst performance, difficult prediction, short duration, large wind power, complex flow field structure, strong unsteadiness and high turbulence, and have important influence on the flight performance, the flight quality, the maneuvering control and the flight safety of the aircraft passing through the wind power generation system. The method is used for finely simulating a complex wind field to obtain the influence of the complex wind field on the aircraft, and is the basis and key of aircraft design and development, airworthiness approval and flight safety assurance. At present, the laboratory physical simulation of the complex wind field is mostly realized by adopting a single-sided or multi-sided fan (fan) array wall and grid wall combination in different directions based on a characteristic parameterized mathematical model of physical characteristics of the natural wind field. For example, the wind tunnel of the low-altitude aircraft in Guangzhou air-sky science and technology institute adopts a single-sided horizontal 8 x longitudinal 6 fan array wall to simulate uniform normal wind, gust and tangential wind. A three-dimensional multi-physical-field wind tunnel of Shenzhen advanced research institute of electronic technology university adopts a single-sided fan array to simulate normal wind, tangential wind and gust, and adopts a multi-fan array combination to simulate downburst and tornado. The multi-fan array wind tunnel of the university of homotaxial and the university of Kazaki in China adopts a multi-fan array to simulate normal wind and pulsating wind. The WindEEE Dome wind tunnel of the university of western An, canada adopts a fan array combination with multiple surfaces in different directions to simulate tornadoes and downburst. The American IBHS research center adopts a multi-fan array to simulate typhoon wind fields. It should be noted that, although the technical facilities and the wind field component methods for constructing the wind field can effectively construct multiple types of complex wind fields, the application scene is limited to hovering or static states of the aircraft because the influence caused by the flying speed of the aircraft can not be simulated almost. Namely, the current complex wind field simulation method and technology are limited in simulation and application capabilities. Disclosure of Invention The invention aims to provide a complex wind field generation system and a complex wind field construction method for cascade collaborative distributed control, which can be used for superposing an unsteady complex wind field on the basis of a uniform flow field of a conventional backflow type low-speed wind tunnel by serially connecting a universal complex wind field generation device capable of adjusting an airflow generation mode, an airflow velocity, an airflow jet direction, an airflow swing frequency and an airflow swing amplitude on the basis of a first power system, so as to realize a complex flow field for coupling a flying speed and the unsteady wind field and simulating an application scene of an aircraft in the flying process. The technical scheme includes that the complex wind field generation system comprises a wind tunnel body in a shape of a Chinese character 'Hui', the wind tunnel body comprises a first diffusion section, a first corner section, a second diffusion section, a second corner section, a first power system, a third diffusion section, a third corner section, a heat exchanger, a fourth corner section, a stabilizing section and a contraction section which are sequentially arranged, an outlet end of the contraction section is provided with a global complex wind field generation device capable of adjusting an airflow generation mode, an airflow velocity, an airflow jet direction, an airflow swing frequency and an airflow swing amplitude, and an inlet end of the first diffusion section is provided with a collector. The outlet end of the all-domain complex wind field generating device is separated from the inlet end of the collector by a certain distance. Furthermore, the universal complex wind field generating device comprises a second power system and an omnidirectional rectangular spray pipe array which are sequentially arranged at the outlet end of the contraction section, wherein the omnidirectional rectangular spray pipe array comprise