CN-122014726-A - Composite pulse jet exciter, application method and aircraft

CN122014726ACN 122014726 ACN122014726 ACN 122014726ACN-122014726-A

Abstract

The application discloses a composite pulse jet exciter, a using method and an aircraft, which belong to the technical field of aircrafts and are used for solving the technical problems of limited frequency and single mode of the existing pulse jet exciter in the related technology. The composite pulse jet exciter comprises a converging channel and a plurality of groups of electromagnetic valves, wherein the electromagnetic valves are arranged in parallel and communicated with an air source, the converging channel is provided with a plurality of air inlet sections, the number of the air inlet sections is the same as that of the electromagnetic valves, the inlet of the air inlet sections is connected with the electromagnetic valves, the converging channel also comprises a converging section, the outlets of the plurality of air inlet sections are communicated with the converging section, and the air flows passing through the plurality of groups of electromagnetic valves are converged in the converging section. According to the application, the electromagnetic valves are arranged in parallel, so that the air flows controlled by the electromagnetic valves are combined in the converging channel, the frequency limit of the pulse jet exciter is broken through, and the exciting working mode of the pulse jet is widened.

Inventors

WANG WANBO
WEI RAN
LIU YAN
SU XINLIN
BIE YUNPENG
QIN CHEN
LI CHAOQUN
HUANG YONG
JIANG YUBIAO
TANG KUN
PAN JIAXIN
ZHAO XINHAI
WU FUZHANG

Assignees

中国空气动力研究与发展中心低速空气动力研究所

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (9)

1. The composite pulse jet exciter is characterized by comprising a converging channel (100) and a plurality of groups of electromagnetic valves, wherein the electromagnetic valves are arranged in parallel, the electromagnetic valves are communicated with an air source, the converging channel (100) is provided with a plurality of air inlet sections (110), the number of the air inlet sections (110) is the same as that of the electromagnetic valves, the inlets of the air inlet sections (110) are connected with the electromagnetic valves, the converging channel (100) further comprises a converging section (120), the outlets of the plurality of air inlet sections (110) are communicated with the converging section (120), and the air flows passing through the plurality of groups of electromagnetic valves are converged in the converging section (120); The composite pulse jet exciter further comprises a jet cavity (400), a constriction section (500) and a jet slit (600), and the outlet of the converging channel (100) is sequentially communicated with the jet cavity (400), the constriction section (500) and the jet slit (600).
2. The composite pulse jet actuator of claim 1, wherein the solenoid valve comprises a first solenoid valve (200) and a second solenoid valve (300), the converging channel (100) is a Y-shaped flow channel, and the first solenoid valve (200) and the second solenoid valve (300) are respectively communicated with two inlets of the converging channel (100).
3. The composite pulse jet actuator of claim 1, wherein a one-way valve (130) is provided at the outlet of each of the intake segments (110), the one-way valve (130) being configured such that air flows from the intake segment (110) to the confluence segment (120).
4. A composite pulse jet actuator according to any one of claims 1-3, wherein a plurality of groups of electromagnetic valves are electrically connected with a signal generator (700), the signal generator (700) is electrically connected with a host computer (800), and the host computer (800) controls the opening and closing and the frequency of the plurality of groups of electromagnetic valves through the signal generator (700).
5. An aircraft comprising a composite pulse jet actuator according to any one of claims 1 to 4.
6. A method of using a composite pulse jet actuator according to any one of claims 1 to 4, comprising the steps of: based on the parameters and/or initial states of a plurality of groups of electromagnetic valves, the working modes of the composite pulse jet flow exciter are controlled by controlling the opening and closing and the frequency of each group of electromagnetic valves, and the working modes of the composite pulse jet flow exciter at least comprise a multi-wave pulse jet flow mode, a frequency multiplication pulse jet flow mode and a steady-pulse composite jet flow mode.
7. The method of using a composite pulse jet actuator according to claim 6, wherein controlling the composite pulse jet actuator in the multi-wave pulse jet mode comprises the steps of controlling a plurality of groups of the electromagnetic valves to be opened and closed in a timing mode with a phase difference, and controlling the plurality of groups of the electromagnetic valves to have the same frequency so as to composite a plurality of pulse jets.
8. The method of using a composite pulse jet actuator according to claim 6, wherein controlling the composite pulse jet actuator in the frequency doubling pulse jet mode comprises the operation steps of controlling a plurality of groups of electromagnetic valves to be opened and closed in a mutually opposite time sequence mode, and controlling the plurality of groups of electromagnetic valves to have the same frequency and duty ratio, so that the frequency reaches frequency doubling after the pulse jet is compounded.
9. A method of using a composite pulse jet actuator in accordance with any one of claims 6-8, wherein controlling the composite pulse jet actuator in the steady-pulse composite jet mode comprises the step of controlling at least one of a plurality of sets of said solenoid valves to remain in a normally open state and at least one of the remaining solenoid valves to remain in a pulsed state to cause a steady jet to be composited with a pulsed jet.

Description

Composite pulse jet exciter, application method and aircraft Technical Field The application relates to the technical field of aircrafts, in particular to a composite pulse jet exciter, a using method and an aircraft. Background The active flow control technology can effectively inhibit flow separation and remarkably improve lift force by injecting momentum into a local flow field of an aircraft, and supports low-speed short-distance take-off and landing. Among them, jet flow control is of great interest due to the stable effect and mature engineering application. The technology relies on a jet flow exciter to convert the pressure energy of compressed gas into kinetic energy, and the jet flow exciter is divided into two types of steady state excitation and pulse according to jet flow forms, wherein the steady state excitation is used for continuous injection, the energy consumption is high, the pulse excitation is used for intermittent injection, and the technology has the advantages of low gas consumption, high efficiency, good control effect and the like, and has more development potential. However, the existing pulse jet exciter has two major bottlenecks (1) the frequency is limited, the electromagnetic valve is relied on to control the switch, the high frequency required by a flow field (the characteristic frequency of a flow field needs to be matched), the high frequency is easy to overheat and lose effectiveness, the frequency is improved under the constraint of cost and device performance, and (2) the electromagnetic valve is single in mode, generally only supports two states of full on/full off, continuous adjustable or half on and other multimode excitation cannot be realized, and the adaptability and the control precision to a complex flow field are limited. Therefore, how to break through the frequency limitation and expand the unsteady excitation working mode becomes a key problem to be solved in the pulse jet exciter technology. Disclosure of Invention The application discloses a composite pulse jet exciter, which aims to solve the technical problems of limited frequency and single mode of the existing pulse jet exciter in the related technology. In order to solve the problems, the application adopts the following technical scheme: in a first aspect, the application provides a composite pulse jet exciter, which comprises a converging channel and a plurality of groups of electromagnetic valves, wherein the electromagnetic valves are arranged in parallel, the electromagnetic valves are communicated with an air source, the converging channel is provided with a plurality of air inlet sections, the number of the air inlet sections is the same as that of the electromagnetic valves, the inlets of the air inlet sections are connected with the electromagnetic valves, the converging channel also comprises a converging section, the outlets of the air inlet sections are communicated with the converging section, and the air flows passing through the electromagnetic valves are converged in the converging section. The composite pulse jet exciter also comprises a jet cavity, a contraction section and a jet slit, and the outlet of the converging channel is sequentially communicated with the jet cavity, the contraction section and the jet slit. Further, the electromagnetic valve comprises a first electromagnetic valve and a second electromagnetic valve, the converging channel is a Y-shaped flow channel, and the first electromagnetic valve and the second electromagnetic valve are respectively communicated with two inlets of the converging channel. Further, a one-way valve is provided at the outlet of each intake section, the one-way valve being configured such that the air flow flows from the intake section to the converging section. Further, the electromagnetic valves are electrically connected with a signal generator, the signal generator is electrically connected with an upper computer, and the upper computer controls the opening and closing and the frequency of the electromagnetic valves through the signal generator. The technical scheme adopted by the application can achieve the following beneficial effects: The application combines the air flows controlled by the electromagnetic valves in the converging channel by arranging the electromagnetic valves in parallel, improves the freedom degree of excitation signals by independently controlling the multiple paths of the electromagnetic valves, breaks through the frequency limit of the pulse jet flow exciter, and widens the excitation working mode of the pulse jet flow by matching the different time sequence control of the electromagnetic valves. In a second aspect, the present application provides an aircraft comprising the composite pulse jet actuator of the first aspect. The aircraft has the same technical characteristics as the composite pulse jet exciter provided by the application, and can achieve the same technical effects, and the technical effects are n