Air wave generating system and method of using the same

Abstract

A gas wave generating system and its use method belong to the field of aerodynamic thermal engineering technology. This gas wave generating system enables the gas mixture to quickly and short-distance transition from deflagration to detonation by setting a premixing chamber and a deflagration acceleration chamber in the gas wave generating device. The system utilizes the rapid pressurization behavior of the unsteady motion shock wave generated in the process of premixed gas deflagration to detonation to achieve a strong discontinuous and discontinuous distribution effect of the shock wave sweeping the airflow pressure field, which can be used in the fields of gas wave cleaning, fire fighting, and bird and animal repelling. The system utilizes the mixing element in the premixing chamber to achieve a full premixing process of the combustible gas and air, and through the strong turbulent disturbance of the turbulent element in the deflagration acceleration chamber, completes the rapid and short-distance transition of the combustion wave from deflagration to detonation, and achieves a spatially discontinuous distribution of the local pressure field of the strong discontinuous sweeping of the airflow. The high-intensity shock wave effect that can be generated by high-activity gases such as coal gas can be achieved in a short distance by using low-activity gases such as coal gas.

Description

Technical Field

[0001] The invention relates to an air wave generating system and a use method thereof, belonging to the technical field of aerodynamic thermal engineering. Background Art

[0002] Air waves are a general term for compression waves, shock waves, and other structures generated by disturbances in compressed gas. If air waves propagate periodically from high-pressure gas to low-pressure gas, their repetitive motion sweeps across the space they propagate, producing periodic fluctuations in pressure, temperature, and other parameters. The greater the unit energy transmitted by the air wave, the greater the pressure ratio between the gas front and rear, the greater the intensity of the air wave, and the greater the speed of the air wave relative to the airflow ahead of the wave. Air wave machinery utilizes air waves to transfer energy. Air wave motions of varying intensities have their own characteristics and generation conditions, and are used in different areas of air wave machinery.

[0003] At present, commonly used air wave machines include air wave superchargers, air wave coolers, air wave engines and shock tubes. The functions of existing air wave machines are relatively simple and can usually only be used in a single field, making it impossible to use one machine in multiple fields. In addition, for machines that require high-intensity air waves to work, flammable and explosive gases such as hydrogen and ethylene are usually required to generate the required shock wave energy. Flammable and explosive gases such as hydrogen and acetylene are relatively dangerous during transportation and use and are not suitable for civilian use. However, the shock wave intensity generated by the combustion of common fuel gases such as coal gas is relatively low and cannot meet the needs of air wave machines in a specific field. Therefore, it is necessary to study an air wave generating system that can not only enable one machine to be used in multiple fields, but also use common safe fuel gases such as coal gas to provide the required high-intensity air waves. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides an air wave generating system and its use method. The system generates high-intensity air waves through common fuel gases such as coal gas, which can be applied to multiple fields such as air wave cleaning, fire fighting, and bird and animal repelling.

[0005] The technical solution adopted by the present invention is: an air wave generating system includes an air distribution device, a control device, a gas supply device and an air wave generating device, wherein the air wave generating device is fixedly connected in sequence by an air inlet pipe section, a premixing chamber, a combustion chamber, a deflagration acceleration chamber and an air wave guide tube, an igniter is provided inside the combustion chamber, and a spoiler element is provided inside the deflagration acceleration chamber, the spoiler element includes a support tube and a spiral blade, the spiral blade is fixed to the support tube in a winding manner, the spoiler element is welded to the inner wall of the deflagration acceleration chamber through the outer edge of the spiral blade, and a slot is provided on the spiral blade, and the blades on both sides of the slot are bent in opposite directions to form a blade flying spike portion.

[0006] The air distribution device adopts a fan connected to the air inlet pipe section through a first check valve.

[0007] The gas supply device uses pipelines to sequentially connect the pressure reducing valve, the fine-tuning valve, the solenoid valve, the second check valve, the flame arrester and the gas inlet at the bottom of the premixing chamber.

[0008] The control device includes an inverter and a controller, and the controller is electrically connected to the inverter, the fan, the solenoid valve and the igniter which are powered by a mobile power supply.

[0009] The inner cavity of the premixing chamber is sequentially provided with a gas inlet sleeve, a first mixing element and a gas outlet sleeve; the first mixing element adopts an expandable mixing chamber, and at least three rows of gas holes connected to the gas ring cavity are evenly arranged along the circumference in the middle of the expandable mixing chamber, and two adjacent exhaust holes are arranged in opposite directions along the circumference, and the number of each exhaust hole is 3-20.

[0010] The inner cavity of the premixing chamber is provided with a gas swirl sleeve, a second mixing element and a gas outlet sleeve in sequence; the second mixing element adopts a convergent-expandable mixing cavity, and 3-20 air holes connected to the gas ring cavity are evenly arranged along the circumference in the middle of the convergent-expandable mixing cavity.

[0011] The number of the spiral blades is 3-10, and each spiral blade is provided with 3-6 slots.

[0012] The controller adopts a PLC controller, and an alarm and an Internet of Things connector are provided on the controller.

[0013] The working process of the air wave generating system includes the following steps:

[0014] a. Connect the pressure reducing valve to the gas tank, connect the inverter to the mobile power supply, and start the controller.

[0015] b. Start the fan through the controller, and the air enters the gas mixing chamber through the first check valve and the air inlet. Open the solenoid valve, pressure reducing valve and fine-tuning valve, and the gas enters the gas ring cavity through the gas inlet, and then enters the gas mixing chamber through the air hole to mix with the air. The gas flow is controlled and adjusted by the fine-tuning valve.

[0016] c. The mixed gas enters the combustion chamber through the gas outlet sleeve, and the igniter is started by the controller. The gas mixture undergoes preliminary deflagration in the combustion chamber and then enters the interior of the deflagration acceleration chamber. After the turbulent disturbance of the spoiler element, it reaches the detonation state, and finally forms a high-speed air wave that propagates from the front of the air wave guide tube.

[0017] d. The ignition frequency of the igniter is adjusted through the controller, thereby controlling the frequency of the air wave, and the pitch of the air wave is controlled by adjusting the depth and number of the slots on the spoiler.

[0018] The beneficial effects of the present invention are as follows: the air wave generating system and its working process include an air distribution device, a control device, a gas supply device and an air wave generating device, and the air wave generating device is fixedly connected in sequence using an air inlet pipe section, a premixing chamber, a combustion chamber, a deflagration acceleration chamber and an air wave guide tube. By arranging a premixing chamber and a deflagration acceleration chamber in the air wave generating device, the gas mixture can be converted from a deflagration state to a detonation state, and the rapid pressurization behavior of the unsteady motion shock wave generated in the process of deflagration to detonation of the premixed gas is utilized to achieve a strong discontinuous and discontinuous distribution effect of the shock wave sweeping across the air flow pressure field, so as to be used in multiple fields such as air wave cleaning, fire fighting and driving away birds and animals. The air distribution device and the gas supply device are connected to different gas tanks through a pressure reducing valve to provide flexible and variable fuel medium and oxidizing medium, and a fine-tuning valve is used to achieve precise adjustment of the air-fuel ratio. This system utilizes mixing elements in the premixing chamber to fully premix the combustible gas and air. Turbulent disturbances generated by the flow elements in the deflagration acceleration chamber transform the combustion wave from a deflagration wave to a detonation wave, achieving a discontinuous distribution of a strong, discontinuous pressure field. This simultaneously saves fuel and eliminates the generation of air-polluting flue gases, achieving both energy conservation and environmental protection. A control device provides real-time dynamic monitoring and automatic control of the pressure ratio and pulse distribution of the system's generated gas waves. This system boasts a simple structure and the technical advantages of easily achieving combustion wave conversion with conventional fuels and a high, controllable gas wave pressure ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of an air wave generating system.

[0020] Figure 2 yes Figure 1 Structural diagram of the premixing chamber.

[0021] Figure 3 yes Figure 2 Left view of the first mixing element.

[0022] Figure 4 yes Figure 1 Structural diagram of another premixing chamber.

[0023] Figure 5 yes Figure 4 Left view of the second mixing element.

[0024] Figure 6 yes Figure 1 A partial enlarged view of the middle spoiler element.

[0025] In the figure: A, air wave generating device, 1, inverter, 2, controller, 3, fan, 3a, first check valve, 4, pressure reducing valve, 4a, fine-tuning valve, 4b, solenoid valve, 4c, second check valve, 4d, flame arrester, 5, air inlet pipe section, 6, premixing chamber, 6a, gas inlet sleeve, 6a1, gas swirl sleeve, 6b, first mixing element, 6b1, air hole, 6b2, gas ring cavity, 6c, gas outlet sleeve, 6d, gas inlet, 6e, second mixing element, 7, combustion chamber, 7a, igniter, 8, deflagration acceleration chamber, 8a, spoiler, 8a1, support tube, 8a2, spiral blade, 8a3, blade spike portion, 9, air wave guide tube. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings.

[0027] Figure 1 、 6 A structural diagram of an air wave generation system is shown. The diagram shows the air wave generation system, which includes a gas distribution device, a control device, a gas supply device, and an air wave generator A. The air wave generator A is sequentially connected by an air inlet pipe section 5, a premixing chamber 6, a combustion chamber 7, a deflagration acceleration chamber 8, and an air wave guide tube 9. An igniter 7a is located within the combustion chamber 7, and a flow disturbance element 8a is located within the deflagration acceleration chamber 8. The flow disturbance element 8a comprises a support tube 8a1 and spiral blades 8a2. The spiral blades 8a2 are secured to the support tube 8a1 in a winding manner. The flow disturbance element 8a is welded to the inner wall of the deflagration acceleration chamber 8 through the outer edges of the spiral blades 8a2. The spiral blades 8a2 are slotted, with the blades on either side of the slots bent in opposite directions to form blade spikes 8a3. There are five spiral blades 8a2, each with four slots.

[0028] The gas distribution device uses a fan 3 connected to the air inlet pipe section 5 through a first check valve 3a. The gas supply device uses pipelines to sequentially connect the pressure reducing valve 4, the fine-tuning valve 4a, the solenoid valve 4b, the second check valve 4c, the flame arrester 4d, and the gas inlet 6d at the bottom of the premixing chamber 6. The control device includes an inverter 1 and a controller 2. The controller 2 is electrically connected to the inverter 1 (powered by a mobile power supply), the fan 3, the solenoid valve 4b, and the igniter 7a. Example 1

[0029] Figure 1 、 2Figures 3 and 4 show the structure of a gas wave generating system. In the figure, the inner cavity of the premixing chamber 6 of this gas wave generating system is sequentially provided with a gas inlet sleeve 6a, a first mixing element 6b, and a gas outlet sleeve 6c. The first mixing element 6b utilizes an expandable mixing chamber. The central portion of the expandable mixing chamber is uniformly circumferentially arranged with at least three rows of gas holes 6b1 that connect to the gas annular cavity 6b2. Adjacent gas holes are arranged in opposite directions along the circumference, and each gas hole 6b1 has twelve gas holes.

[0030] The gas wave sending system shown in this embodiment adopts an expandable mixing chamber as the mixing element. At least three rows of gas holes connected to the gas ring cavity are evenly arranged along the circumference in the middle of the expandable mixing chamber. The two adjacent exhaust holes are arranged in opposite rotation directions along the circumference. The structural arrangement of multiple exhaust holes and opposite rotation directions of the two adjacent exhaust holes can enable the gas and air to be mixed quickly and fully, enter the deflagration acceleration chamber to generate a more intense combustion wave, and finally generate a high-intensity shock wave. Example 2

[0031] Figure 1 、 4 Figures 5 and 6 show the structure of another gas wave generating system. In this figure, the premixing chamber 6 of this system is sequentially equipped with a gas swirl sleeve 6a1, a second mixing element 6e, and a gas outlet sleeve 6c. The second mixing element 6e utilizes a convergent-expandable mixing chamber. Twelve gas holes 6b1 are evenly distributed along the circumference of the central portion of the chamber, connecting to a gas annular chamber 6b2.

[0032] Compared with the structure of Example 1, the mixing element of the structure shown in this embodiment adopts a converging and expanding mixing chamber. The middle part of the converging and expanding mixing chamber is evenly provided with air holes connecting to the gas ring cavity along the circumference, and the inner cavity of the premixing chamber 6 is provided with a gas swirl sleeve 6a1. A rotating air flow with negative pressure at the center is formed behind the gas swirl sleeve 6a1. The rotating air flow enters the gas mixing chamber and can be more fully mixed with the gas. After the rotating air flow is accelerated by the narrowing section of the converging and expanding mixing chamber, it is fully mixed with the gas at the throat of the converging and expanding mixing chamber. The mixed gas is accelerated again by the expanding section of the converging and expanding mixing chamber at a higher speed to enter the combustion chamber 7 for explosion. The air wave transmission system of this structure can generate shock waves with faster speed and longer propagation distance.

[0033] Embodiments 1 and 2 are not the only structural combinations of the present invention. The present invention can adjust the structure of the air wave generating device according to the required air wave intensity, speed, and propagation distance. For example, when it is necessary to generate an air wave with greater intensity, faster speed, and longer propagation distance, multiple exhaust holes can be set in the middle of the contraction-expansion mixing chamber of the second mixing element 6e in embodiment 2 to change the swirl direction of two adjacent exhaust holes. It is also possible to set a gas swirl sleeve in the inner cavity of the premixing chamber in embodiment 1 according to actual needs. The above structure can adjust the number of each exhaust hole and the inclination angle of the air hole according to actual needs, and can also adjust the number of spiral blades and the depth and number of grooves of each spiral blade.

[0034] This air wave generation system uses a premixing chamber and a deflagration acceleration chamber to fully mix gas and air, transitioning from deflagration to detonation. Using commonly available safe fuels like coal gas, it can generate a strong air wave by burning highly reactive gases like ethylene. This system offers reliable safety and excellent air wave generation, making it suitable for applications such as air wave cleaning, firefighting, and bird and animal repellent.

Claims

1. A gas wave generating system, comprising a gas distribution device and a control device, characterized in that: The invention also includes a gas supply device and an air wave generating device (A). The air wave generating device (A) is fixedly connected in sequence by an air inlet pipe section (5), a premixing chamber (6), a combustion chamber (7), a deflagration acceleration chamber (8) and an air wave guide tube (9). An igniter (7a) is provided inside the combustion chamber (7). A spoiler element (8a) is provided inside the deflagration acceleration chamber (8). The spoiler element (8a) includes a support tube (8a1) and a spiral blade (8a2). The spiral blade (8a2) is fixed to the support tube (8a1) in a winding manner. The spoiler element (8a) is fixed to the support tube (8a1) by the outer surface of the spiral blade (8a2). The edge is welded to the inner wall of the deflagration acceleration chamber (8), a slot is provided on the spiral blade (8a2), and the blades on both sides of the slot are bent in opposite directions to form a blade thorn portion (8a3); The air distribution device uses a fan (3) connected to the air inlet pipe section (5) through a first check valve (3a); The gas supply device uses pipelines to sequentially connect the pressure reducing valve (4), the fine-tuning valve (4a), the solenoid valve (4b), the second check valve (4c), the flame arrester (4d) and the gas inlet (6d) at the bottom of the premixing chamber (6); The control device comprises an inverter (1) and a controller (2), wherein the controller (2) is electrically connected to the inverter (1) powered by a mobile power supply, a fan (3), a solenoid valve (4b), and an igniter (7a); The inner cavity of the premixing chamber (6) is provided with a gas inlet sleeve (6a), a first mixing element (6b) and a gas outlet sleeve in sequence; the first mixing element (6b) adopts an expansion type mixing chamber, and at least three rows of gas holes connected to the gas ring cavity are evenly arranged along the circumferential direction in the middle of the expansion type mixing chamber, and two adjacent exhaust holes are arranged in opposite directions along the circumferential direction, and the number of each exhaust hole (6b1) is 3-20; or, The inner cavity of the premixing chamber (6) is provided with a gas swirl sleeve (6a1), a second mixing element (6e) and a gas outlet sleeve in sequence; the second mixing element (6e) adopts a convergent-expandable mixing cavity, and 3-128 gas holes connected to the gas ring cavity are evenly arranged in the middle of the convergent-expandable mixing cavity along the circumference.

2. The air wave generating system according to claim 1, characterized in that: The number of the spiral blades (8a2) is 3-10, and each spiral blade (8a2) is provided with 3-6 slots.

3. The air wave generating system according to claim 1, characterized in that: The controller (2) adopts a PLC controller, and an alarm and an Internet of Things connector are provided on the controller (2).

4. The method for using the air wave generating system according to claim 1, characterized in that: The steps include: a. Connect the pressure reducing valve (4) to the gas tank, connect the inverter (1) to the mobile power supply, and start the controller (2); b. Start the fan (3) through the controller (2), and the air enters the gas mixing chamber through the first check valve (3a) and the air inlet pipe section (5). The solenoid valve (4b), the pressure reducing valve (4) and the fine-tuning valve (4a) are opened, and the gas enters the gas ring chamber (6b2) through the gas inlet (6d), and then enters the gas mixing chamber through the air hole (6b1) to mix with the air. The flow rate of the gas is controlled and adjusted by the fine-tuning valve (4a); c. The mixed gas enters the combustion chamber (7) through the gas outlet sleeve (6c), and the igniter (7a) is activated by the controller (2). The gas mixture undergoes preliminary deflagration in the combustion chamber (7) and then enters the interior of the deflagration acceleration chamber (8). After the turbulent disturbance of the spoiler element (8a), the gas mixture reaches a detonation state, and finally forms a high-speed air wave that propagates from the front of the air wave guide tube (9); d. The ignition frequency of the igniter (7a) is adjusted by the controller (2), thereby controlling the frequency of occurrence of the periodic motion air wave, and the spatial distance from deflagration to detonation is controlled by adjusting the depth and number of the grooves on the spoiler element (8a).

Images