CN112834231B - Atomizing, combustion and emission characteristic experiment device and method for collision spraying - Google Patents
Atomizing, combustion and emission characteristic experiment device and method for collision spraying Download PDFInfo
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- CN112834231B CN112834231B CN202011622383.8A CN202011622383A CN112834231B CN 112834231 B CN112834231 B CN 112834231B CN 202011622383 A CN202011622383 A CN 202011622383A CN 112834231 B CN112834231 B CN 112834231B
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Abstract
The invention belongs to the field of internal combustion engine spraying experiments, and particularly discloses an atomization, combustion and discharge characteristic experiment device and method for collision spraying, wherein the device comprises a constant volume combustion bomb system, an oil injection system and an optical acquisition system, the constant volume combustion bomb system comprises a constant volume combustion bomb, an electric control gas distribution assembly and a spark plug, the constant volume combustion bomb comprises a plurality of main mounting seats which are vertically connected with each other, and an auxiliary mounting seat is arranged between each main mounting seat; quartz glass windows are arranged on the two opposite main mounting seats, and more than three main mounting seats are reserved as oil injector mounting seats; the electric control gas distribution assembly and the spark plug are connected into the constant volume combustion bomb through different auxiliary mounting seats; the oil injection system comprises a plurality of oil injectors, and the plurality of oil injectors are arranged on different oil injector mounting seats; the optical acquisition system performs optical acquisition on the inside of the constant-volume combustion bomb through the quartz glass window. The invention is suitable for the experiments for researching the atomizing, burning and discharging characteristics of spray collision in various high-temperature, high-pressure and turbulent flow environments.
Description
Technical Field
The invention belongs to the field of internal combustion engine spraying experiments, and particularly relates to an experimental device and method for atomizing, burning and discharging characteristics of collision spraying.
Background
The internal combustion engine has the advantages of high thermal efficiency, compact structure, large power output, wide range and the like, and is rapidly developed in the current society, and the internal combustion engine is used as the internal combustion engine with the highest thermal efficiency in various power machines applied in the industrialized process and is applied to various fields such as ships, power generation, military special armored vehicles and the like. The special high-power density internal combustion engine is based on the requirement of extreme compactness, pursues the characteristics of volume limit, strong dynamic property limit and the like, namely, the requirement of reaching extreme high power per liter is required, and the extremely high power per liter often requires a larger fuel injection rate. In order to improve the oil injection rate of the oil injector, the most direct, effective and feasible method is to improve the fuel injection pressure, the injection rate of the fuel can be greatly improved by improving the fuel injection pressure, in addition, the oil-gas mixing stage can be more sufficient, and the combustion stage is correspondingly improved. However, the injection rate of the existing injector under high injection pressure is often not large enough, so that the injector becomes one of the bottlenecks that further increase of the power per liter of the internal combustion engine is restricted. For the power required by a special high-power-density internal combustion engine, the oil injection rate of a single oil injector cannot meet the requirement. The double-oil injector mode or the multi-oil injector mode can obviously improve the fuel injection rate of the internal combustion engine, so the power per liter of the internal combustion engine can be further improved, two oil injectors or a plurality of oil injectors are simultaneously arranged in a combustion chamber of the internal combustion engine, interference and collision phenomena can certainly exist between spray mist beams of fuel, the spray collision can have important influence on atomization, oil-gas mixing and subsequent combustion of the fuel and the overall thermal efficiency of the internal combustion engine, and related research is almost not needed for atomization, combustion and emission of the spray collision, and corresponding research is needed.
In recent years, a plurality of scholars build visual constant volume bomb systems by using optical instruments, relevant spraying characteristics and burning characteristics are studied in detail, relevant testing and analysis technologies are mature, and the patent 'a multifunctional constant volume bomb for spraying, burning and soot generation characteristic testing' (application number 201310717167.5) shows that the visual constant volume bomb system built by the applicant subject group is one of the visual constant volume bomb systems. The patent "a multi-functional spraying and visual constant volume bullet of measuring of burning" (application number 201610814864.6) proposes the design of the novel constant volume bullet body of six windows, three light paths, though its multiple light path design can only be suitable for multiple test technique and be used for measuring spraying, combustion process, but the design of many quartz glass window mechanisms makes the limited and device of constant volume bullet body pressure resistance still can not be applicable to the spraying of two oil sprayers and many oil sprayers and collides the experimental study. The utility model discloses a high temperature high pressure natural gas diesel oil dual fuel spraying constant volume burning bullet device (application number 201922223224.X) introduced a design is established to internal dual fuel spraying of constant volume bullet, it is fixed in constant volume bullet top adapter plate with diesel oil sprayer and natural gas sprayer together on, this application design has installed two sprayers simultaneously in the constant volume bullet, but it has pointed out two sprayer fixed mounting on same adaptation apron, so can't realize the spraying bump test of different collision forms, and only be applicable to gaseous and the experiment of the dual fuel spraying of liquid. The patent 'an opposed piston engine interference spray testing device' (application number 201710970012.0) provides a multi-angle oil sprayer spray interference experimental device for realizing collision atomization experiments; the device can realize the experimental observation of collision atomization, but if the experimental study of collision combustion and collision emission characteristics is further realized, the device has larger limitation, on one hand, in the design of the device, in order to enable the oil sprayer to rotate, a hollow spherical pit designed by the device is too deep, so that a sealing plate of a base of the oil sprayer is thinner, and therefore, the bearing capacity of a bomb is lower; on the other hand, in order to increase the rotation angle of the oil sprayer, the designed rotating base enables a large part of the spray head of the oil sprayer to be arranged in the bomb, so that the interference experiment platform of the oil sprayer can not be carried out under the high-temperature condition; due to the two factors, the experimental research on the characteristics of collision combustion and collision emission cannot be realized by the platform, and the experimental range is narrow; and due to the design of the oil sprayer base, the oil sprayer can only be adjusted within a certain angle range, and a wide-area angle experiment cannot be covered.
At present, the collision oil injection gradually becomes a hot point, so that the research on collision spraying, collision combustion and collision emission characteristics is very important, but most of the research is in a numerical simulation mode, corresponding experimental research is rare, the visual experimental research on the collision spraying, combustion and emission characteristics of a multi-oil injector based on a constant volume bomb system is rare and rare, and a visual experimental research device for the collision spraying, collision combustion and collision emission characteristics of double-oil injectors under the corresponding high-temperature, high-pressure and turbulent environment is in urgent need of research.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides an atomization, combustion and discharge characteristic experiment device and method for collision spray, and aims to provide the required test temperature, pressure and turbulent flow environment through the combustion of premixed fuel of a pre-combustion type constant volume bomb system, study the collision spray, combustion and discharge test experiments of multiple fuel injectors in a wide temperature and pressure range under the working state similar to that of an internal combustion engine, and adapt to the matching design of the multiple fuel injectors in the actual machine state of the internal combustion engine under various in-cylinder states such as high temperature, high pressure and turbulent flow environment.
In order to achieve the above object, according to an aspect of the present invention, an experimental apparatus for atomization, combustion and discharge characteristics of impinging spray is provided, which includes a constant volume combustion bomb system, an oil injection system and an optical collection system, wherein:
the constant-volume combustion bomb system comprises a constant-volume combustion bomb, an electric control gas distribution assembly and a spark plug, wherein the constant-volume combustion bomb comprises a plurality of main mounting seats which are vertically connected with each other, and an auxiliary mounting seat is arranged between each main mounting seat; quartz glass windows are arranged on the two main mounting seats which are opposite, and more than three main mounting seats are reserved as oil sprayer mounting seats; the electric control gas distribution assembly and the spark plug are respectively connected into the constant volume combustion bomb through different auxiliary mounting seats;
the oil injection system comprises a plurality of oil injectors which are respectively arranged on different oil injector mounting seats; and the optical acquisition system optically acquires the inside of the constant-volume combustion bomb through the quartz glass window.
Preferably, the injector mounting seat is provided with a groove, the groove is internally provided with a spherical mounting seat, the spherical mounting seat is pressed in the groove through a pressing cover fixedly connected with the injector mounting seat, the injector is mounted on the spherical mounting seat, and an annular cooling water channel is processed in the spherical mounting seat around the injector.
Preferably, the injector mounting seat and the spherical mounting seat are correspondingly provided with positioning pin holes, and the injector mounting seat and the spherical mounting seat are connected through a positioning pin arranged in the positioning pin hole, so that the spherical mounting seat is fixed in the axial direction and can only rotate around the positioning pin.
As a further preference, the compression cap is provided with angle markings to determine the angle of rotation of the respective injector.
Preferably, a brass sealing gasket is arranged between the pressing cover and the spherical mounting seat; and the pressing cover is provided with a cooling water channel sliding port for the inlet and outlet of cooling water, and the cooling water channel sliding port is communicated with the annular cooling water channel.
Preferably, the constant volume bomb system further comprises a magnetic coupling fan, and the magnetic coupling fan is mounted on the auxiliary mounting seat of the constant volume bomb.
Preferably, the constant volume bomb system further comprises a pressure sensor, and the pressure sensor is installed in the constant volume bomb through a secondary installation seat.
Preferably, the constant volume bomb fuel injection system further comprises a control system, and the control system is connected with the constant volume bomb fuel injection system, the optical acquisition system and the constant volume bomb fuel injection system.
According to another aspect of the invention, an experimental method for atomizing, burning and discharging characteristics of collision spray is provided, and is realized by adopting the experimental device, and comprises the following steps:
s1, inputting pre-burning gas into the constant-volume combustion bomb through the electric control gas distribution assembly, and then igniting the pre-burning gas in the constant-volume combustion bomb through a spark plug;
s2, simultaneously generating a plurality of sprayed oil mist at preset positions by a plurality of oil sprayers to enter a constant volume combustion bomb to realize spray collision; meanwhile, the optical acquisition system focuses on the collision center of the multiple sprayed oil mist through a quartz glass window to start shooting, and records the whole process from spraying, development and collision of the multiple sprayed oil mist.
More preferably, in step S1, after the air distribution is input into the constant volume burner, the magnetic coupling fan is rotated to adjust the swirl intensity in the constant volume burner to the experimental condition, and the pilot fuel in the constant volume burner is ignited by the spark plug.
Generally, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the invention provides a device for researching multi-oil-beam collision spraying, burning and discharging in practical experiment, which can provide required test background temperature, pressure and turbulence intensity by burning premixed fuel of a pre-burning type constant volume bomb system, can research collision spraying, burning and discharging test experiments of a multi-oil injector in a wider temperature, pressure and turbulence intensity range, and is suitable for matching design of the multi-oil injector under the actual engine condition of an internal combustion engine in various high-temperature, high-pressure and turbulence environments; meanwhile, the constant volume bomb body part is composed of all parts, so that the bomb is convenient to disassemble and is more beneficial to daily maintenance.
2. According to the invention, through the design of the mounting seat of the constant-volume elastomer oil sprayer, the research on the collision of the double-oil sprayer in multi-azimuth and arbitrary-angle spraying can be realized; specifically, a plurality of oil sprayer installation seats are preset on the constant volume bomb body, the double oil sprayers can be arranged in a 180-degree opposite mode or a 90-degree opposite mode, experimental condition selection can be provided for multidirectional injection factors, the oil sprayer installation seats are consistent in installation mode and size of the bomb body, position interchange can be achieved, and wider selection is provided for multiple injection combination conditions of experiments.
3. The oil sprayer is specifically arranged on a spherical mounting seat, can provide experimental condition selection for multi-angle spraying factors, and is fixed by a positioning pin, so that the oil sprayer can only rotate in the radial direction, and the two oil sprayers are guaranteed to spray and collide on the same plane; meanwhile, the spherical mounting seat can wrap the oil sprayer to prevent the oil sprayer from being damaged due to heating in combustion flame, and meanwhile, an annular cooling water channel is processed in the spherical mounting seat around the oil sprayer to facilitate heat dissipation of the oil sprayer, so that collision spraying is carried out in a high-temperature and high-pressure environment, and the oil sprayer can be protected in a collision combustion and collision emission test experiment.
4. The high-temperature and high-pressure environment under combustion and emission test experiments can be resisted by designing the mounting seat of the constant-volume elastomer oil sprayer; particularly, the sliding port is formed in the pressing cover, the oil sprayer cooling circulation system is connected, the temperature of the oil sprayer is reduced, the temperature resistance is higher, and meanwhile, a brass gasket is arranged between the pressing cover and the spherical mounting seat to ensure that the air tightness is good under the high-pressure condition.
5. The magnetic coupling fan is arranged at the constant-volume elastomer auxiliary mounting seat, the magnetic coupling fan is stirred to control the vortex intensity so as to change the vortex ratio under the experimental working condition, and the double-oil-sprayer jet spray collision experiment can be researched under the condition of variable vortex ratio.
Drawings
FIG. 1 is a schematic structural diagram of an experimental apparatus for atomization, combustion and emission characteristics of impinging spray according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a constant volume burner pellet in accordance with an embodiment of the present invention;
FIG. 3 is a perspective view of a constant volume burner pellet according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a variable angle spherical mount according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a fuel injector mount according to an embodiment of the invention;
FIG. 6 is a schematic structural view of a fuel injector mounting seat compression cover according to an embodiment of the invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein: 1-light source, 2-spherical mirror, 3-constant volume combustion bomb, 4-pressure sensor, 5-oil injector, 6-control host, 7-spark plug, 8-high speed camera, 9-fuel supply subsystem, 10-magnetic coupling fan, 11-electromagnetic valve, 12-high pressure gas cylinder, 13-auxiliary mounting seat, 14-silica gel heating film, 15-quartz glass window, 16-glass pressing cover, 17-oil injector mounting seat, 18-locking screw gland, 19-spherical mounting seat, 20-pressing cover, 21-cooling water channel, 22-positioning pin hole, 23-sealing ring groove, 24-positioning rod, 25-cooling water channel sliding port, 26-oil injector sliding port and 27-positioning rod sliding port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The experimental device for atomizing, burning and discharging characteristics of collision spraying, as shown in fig. 1, provided by the embodiment of the invention, comprises a constant volume burning bomb system, an oil injection system, an optical acquisition system and a control system, wherein:
the constant volume combustion bomb system comprises a constant volume combustion bomb 3, an electric control gas distribution assembly, a spark plug 7 and a magnetic coupling fan 10, wherein: the constant-volume combustion bomb 3 comprises a plurality of main mounting seats which are vertically connected with each other, an auxiliary mounting seat 13 is arranged between the main mounting seats, all the main mounting seats and the auxiliary mounting seats 13 jointly form a constant-volume combustion bomb 3 shell with a cavity, a silica gel heating film 14 wraps the surface of the shell of the constant-volume combustion bomb 3, and an insulation board wraps the silica gel heating film 14, so that a bomb body can be uniformly heated to 383K, and the phenomenon that water vapor generated during combustion of premixed fuel is condensed at a transparent plate to influence the sight line is avoided; on the other hand reduces the projectile outer wall heat transfer coefficient, reduces the internal radiating speed to the outside of projectile to make the temperature decline curve in the constant volume projectile comparatively gentle, so that carry out the diesel oil spraying and collide the experiment under the operating mode of relative steady state.
Specifically, as shown in fig. 2 and 3, the surfaces of the main mounting seats are all quadrilateral, six vertex angles of the main mounting seats are connected with each other to form a sphere, the surfaces of the auxiliary mounting seats are triangular, and eight auxiliary mounting seats are respectively arranged at intervals of the main mounting seats, so that an elastomer with a cavity is formed; transparent quartz glass windows 15 are arranged on the two main mounting seats with opposite positions on the side edges, the quartz glass windows 15 are pressed tightly through a glass pressing cover 16, and the glass pressing cover 16 and the quartz glass windows 15 are fixed on the main mounting seats through cured silicon rubber; the other three upper main mounting seats are reserved as oil injector mounting seats 17;
the electric control gas distribution assembly and the spark plug 7 are respectively connected into the constant volume combustion bomb 3 through different auxiliary mounting seats 13 and are used for generating a high-temperature and high-pressure environment required by a test; the electric control gas distribution assembly specifically comprises a high-pressure gas cylinder 12 and an electromagnetic valve 11, wherein gas in the high-pressure gas cylinder 12 enters the constant-volume combustion bomb 3 through the electromagnetic valve 11; the magnetic coupling fan 10 is arranged on an auxiliary mounting seat 13 at the lower end of the constant volume combustion bomb 3 and is used for adjusting the vortex intensity in the constant volume bomb to form different turbulent flow environments; in addition, a pressure sensor 4 is arranged on an auxiliary mounting seat 13 at the upper end of the side, is connected with a control system through a lead and is used for monitoring the pressure change condition in the projectile body in real time;
to 3 openings of constant volume burning bomb, through locking screw gland 18 with the fluoro elastomer O type circle extrusion of resistant oil high temperature resistance get into 3 sealing position of constant volume burning bomb, can satisfy the sealed requirement under the high temperature high pressure condition, and the sealing washer can not receive the ablation of gas.
The fuel injection system comprises a fuel supply subsystem 9 and a plurality of fuel injectors 5 (two or more), wherein the fuel supply subsystem 9 is used for supplying fuel to the fuel injectors 5; according to the experiment requirements, the oil injectors 5 are respectively installed on the reserved oil injector installation seats 17 with the corresponding number optionally, and the multi-azimuth colliding injection experiment can be realized.
The optical acquisition system is for passing through the transparent plate is right 3 inside shots of constant volume burning bullet, and is concrete, and it is high-speed digital schlieren method optical system, including schlieren instrument and high-speed camera 8, and the schlieren instrument includes light source 1 and two spherical mirrors 2, light source 1 specifically is that the light that the xenon lamp sent passes through a spherical mirror reflection, and it is inside to get into 3 of constant volume burning bullet from one side quartz glass window 15 to jet out from opposite side quartz glass window 15, then get into high-speed camera 8 through another spherical mirror reflection, thereby shoot and obtain 3 inside images of constant volume burning bullet, and transmit the image for control system.
Further, as shown in fig. 4, a groove is formed in the injector mounting seat 17, a spherical mounting seat 19 is mounted in the groove, the spherical mounting seat 19 is pressed in the groove through a pressing cover 20, the pressing cover 20 and the injector mounting seat 17 are mechanically connected through a fixing bolt 24, the injector 5 is mounted on the spherical mounting seat 19, and the spherical mounting seat 19 can wrap the injector 5; the positioning rod above the oil sprayer 5 is rotated left and right, and the spherical mounting seat 19 can be rotated to enable the oil sprayer 5 to deflect various angles so as to realize multi-angle diesel oil spraying; furthermore, as shown in fig. 5, the injector mounting seat 17 and the spherical mounting seat 19 are provided with corresponding positioning pin holes 22, the positioning pins are mounted in the positioning pin holes, so that the spherical mounting seat 19 is fixed in the axial direction, and the injector rotates by rotating the spherical mounting seat to protrude the positioning rod 24 so that the injector rotates circumferentially around the positioning pins along with the spherical mounting seat, so that the injector rotates in multiple angles, and thus the injector rotates only axially in a single plane, and the two injectors are guaranteed to spray on the same plane; the fuel injector mounting seat 17 is further provided with a sealing ring groove 23 for mounting a sealing ring.
Preferably, as shown in fig. 6, four sliding ports are formed in the pressing cover 20, which are two cooling water channel sliding ports 25, one fuel injector sliding port 26, and one positioning rod sliding port 27, wherein the two cooling water channel sliding ports 25 are communicated with the cooling water channel 21 on the spherical mounting seat, and are respectively used for the inlet and outlet of cooling water; the oil injector sliding port 26 is communicated with the upper shaft body of the oil injector; the positioning rod sliding port 27 is communicated with the convex positioning rod 24 of the spherical mounting seat; the four sliding ports can realize the rotation of the spherical mounting seat without intervening angle swing, in addition, the upper end surface of the pressing cover can be horizontally fixed by an oil sprayer, and the structure strength of the pressing plate can ensure the pressure resistance of the projectile body.
Preferably, the pressing cover 20 is engraved with an angle mark, so that the rotation angle of the corresponding fuel injector 5 can be conveniently and clearly determined, and the spray collision state can be clearly determined; the pressing cover 20 needs to have sufficient thickness and rigidity to press the spherical mounting seat 19, and a brass sealing gasket is arranged between the pressing cover 20 and the spherical mounting seat 19 to realize sealing in high-temperature and high-pressure environments in collision spray, collision combustion and collision emission test experiments; the upper surface of the pressing cover 20 is a plane, a fuel injector mounting threaded hole is processed on the plane, the fuel injector can be pressed through the threaded hole, and sealing under high-temperature and high-pressure environments in collision spraying, collision burning and collision emission test experiments is realized; angle marks are engraved on the pressing cover 20, so that the rotation angle of the oil sprayer can be conveniently and clearly determined, and the spraying collision state can be clearly determined; the upper surface of the spherical mounting seat 19 is provided with a rotary positioning rod 24, and the rotary positioning rod 24 is changed by operation, so that the spherical mounting seat can rotate around the positioning pin, the looseness of the fuel injector caused by the rotation of the fuel injector by direct operation is avoided, and the deformation of the positioning pin caused by the positioning pin as a rotating part is also avoided.
The control system, namely the control host 6, is connected with the constant volume combustion bomb system, the oil injection system and the optical acquisition system. When the constant volume combustion bomb system works, the control host sends five paths of synchronous pulse signals with specific phase differences, specific phase differences can be set among the five paths of synchronous pulse signals with specific phase differences, in the five paths of pulse signals, the first path of pulse signal triggers an electric control gas distribution assembly in the constant volume combustion bomb system, the gas distribution amount is controlled by controlling a solenoid valve switch, and pre-combustion gas is filled into a cylinder; the second path of pulse signal triggers a magnetic coupling fan motor to enable a fan to rotate, and the eddy current intensity in the constant volume bomb is adjusted to the experimental working condition; triggering two electrodes of an ignition coil and a spark plug in the constant volume combustion bomb system by a third pulse signal to generate high-voltage discharge ignition, igniting pre-combustion gas in the constant volume bomb body, and generating a high-temperature and high-voltage experimental environment to enable the in-cylinder environment to reach the experimental requirement working condition; the fourth path of pulse signals triggers a high-pressure oil injection system, a high-pressure oil pump starts to pump oil, and a plurality of oil injectors simultaneously generate a plurality of beams of sprayed oil mist to realize spray collision; and triggering the optical acquisition system to focus on a multi-beam spray collision center through a quartz window of the constant volume combustion bomb to start shooting by a fifth pulse signal, and recording the whole process from the ejection, development and collision of the multi-beam oil mist.
A method for testing atomizing, combustion and emission characteristics of collision spray is carried out by adopting the visual testing device (taking two oil injectors as an example), and comprises the following steps:
s1, adjusting the proportion of pre-burning gas through the control interface of the control host 6, then transmitting a beam of pulse signals to control the electric control gas distribution assembly, opening the switch of the electromagnetic valve 11 of the high-pressure gas cylinder 12 communicated with the constant-volume combustion bomb 3, enabling the gas in the high-pressure gas cylinder 12 to enter the constant-volume combustion bomb 3, measuring the bomb pressure through the pressure sensor 4, reaching the preset target, sending a signal to the control host, and then controlling the gas distribution electromagnetic valve to close;
s2, a control panel of the control host 6 is manually operated, a switch of the magnetic coupling fan 10 is triggered, the rotating speed is adjusted to the vortex intensity required by the experiment, an ignition button is triggered, the control host sends a pulse signal to an ignition driving control unit, a spark plug 7 is driven to generate high-voltage discharge ignition, pre-burning gas in a cylinder is ignited, and a high-temperature and high-voltage experiment environment is generated;
s3, when the temperature in the projectile body is reduced through a wall surface heat transfer temperature curve and is reduced to a set specified experiment condition of the control host 6, the control host sends a pulse signal to control the electromagnetic valve to be opened, so that the two fuel injectors spray high-pressure oil mist, and a collision experiment is realized; simultaneously, a pulse signal is sent to the high-speed camera 8 by the control host 6, the high-speed camera 8 is triggered to start working, a beam of parallel light beams is sent by the light source 1, after passing through the spherical mirror 2, the light beams are parallelly injected into the constant volume combustion bomb 3 through quartz glass, and then enter the high-speed camera 8 after being reflected by the spherical mirror 2, so that the whole process from spraying and developing to collision of two beams of oil mist is completely recorded and shot by the high-speed camera 8, an image result is transmitted to the control host 6, and the atomization, combustion and emission characteristic experiments of collision spraying of the double oil sprayers are completed.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an atomizing of collision spraying, burning, emission characteristic experimental apparatus which characterized in that, includes constant volume burning bullet system, oil injection system and optics collection system, wherein:
the constant-volume combustion bomb system comprises a constant-volume combustion bomb (3), an electric control gas distribution assembly and a spark plug (7), wherein the constant-volume combustion bomb (3) comprises a plurality of main mounting seats which are vertically connected with each other, and an auxiliary mounting seat (13) is arranged between each main mounting seat; quartz glass windows (15) are arranged on the two main mounting seats which are opposite, and more than three main mounting seats are reserved as fuel injector mounting seats (17); the electric control gas distribution assembly and the spark plug (7) are respectively connected into the constant volume combustion bomb (3) through different auxiliary mounting seats (13); the surface of the outer shell of the constant volume combustion bomb is wrapped with a silica gel heating film, and an insulation board is wrapped outside the silica gel heating film;
the oil injection system comprises a plurality of oil injectors (5), and the plurality of oil injectors (5) are respectively arranged on different oil injector mounting seats (17); the optical acquisition system optically acquires the interior of the constant-volume combustion bomb (3) through the quartz glass window (15);
the oil sprayer mounting seat (17) is provided with a groove, a spherical mounting seat (19) is mounted in the groove, the spherical mounting seat (19) is pressed in the groove through a pressing cover (20) fixedly connected with the oil sprayer mounting seat (17), and the oil sprayer (5) is mounted on the spherical mounting seat (19); an annular cooling water channel (21) is processed in the spherical mounting seat (19) around the fuel injector (5);
the fuel injector mounting seat (17) and the spherical mounting seat (19) are correspondingly provided with positioning pin holes (22), and the fuel injector mounting seat (17) and the spherical mounting seat (19) are connected through positioning pins arranged in the positioning pin holes (22), so that the spherical mounting seat (19) is fixed in the axial direction and can only rotate around the positioning pins; meanwhile, the oil sprayer rotates along with the spherical mounting seat around the positioning pin in the circumferential direction by rotating the spherical mounting seat to protrude the positioning rod.
2. The experimental device for the atomization, combustion and emission characteristics of impinging sprays as set forth in claim 1, characterized in that said hold-down cap (20) is engraved with angular marks to determine the rotation angle of the corresponding injector (5).
3. The experimental device for the atomization, combustion and emission characteristics of impinging sprays as set forth in claim 1, characterized in that a brass gasket is installed between said pressing cap (20) and said spherical mounting seat (19); and a cooling water channel sliding opening (25) for the inlet and outlet of cooling water is formed in the pressing cover (20), and the cooling water channel sliding opening (25) is communicated with the annular cooling water channel (21).
4. The atomization, combustion and discharge characteristic test device of the impinging spray as set forth in claim 1, wherein the constant volume burner system further comprises a magnetic coupling fan (10), and the magnetic coupling fan (10) is mounted on a secondary mounting seat (13) of the constant volume burner (3).
5. The experimental device for the atomization, combustion and discharge characteristics of the impinging spray as claimed in claim 1, wherein the constant volume combustion bomb system further comprises a pressure sensor (4), and the pressure sensor (4) is installed in the constant volume combustion bomb (3) through a secondary installation seat.
6. The experimental device for the atomization, combustion and discharge characteristics of the colliding spray of any one of claims 1 to 5, further comprising a control system, wherein the control system is connected with the constant volume combustion bomb system, the oil injection system and the optical collection system.
7. An experimental method for the atomization, combustion and emission characteristics of collision spray, which is carried out by using the experimental device as claimed in any one of claims 1 to 6, and comprises the following steps:
s1, inputting pre-burning gas into the constant-volume combustion bomb through the electric control gas distribution assembly, and then igniting the pre-burning gas in the constant-volume combustion bomb through a spark plug;
s2, simultaneously generating a plurality of sprayed oil mist at preset positions by a plurality of oil sprayers to enter a constant volume combustion bomb to realize spray collision; meanwhile, the optical acquisition system focuses on the collision center of the multiple sprayed oil mist through a quartz glass window to start shooting, and records the whole process from spraying, development and collision of the multiple sprayed oil mist.
8. The experimental method for the atomization, combustion and discharge characteristics of the collision spray as claimed in claim 7, wherein in the step S1, after the air distribution is input into the constant volume combustion bomb, the magnetic coupling fan rotates to adjust the vortex intensity in the constant volume combustion bomb to the experimental working condition, and then the pre-combustion fuel in the constant volume combustion bomb is ignited by the spark plug.
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| CN113340602B (en) * | 2021-07-06 | 2023-01-24 | 天津大学 | Visual variable-volume bomb device capable of realizing multi-directional observation and method |
| CN113944582A (en) * | 2021-12-07 | 2022-01-18 | 北京交通大学 | Fuel oil spraying characteristic test system used under low-temperature cold start condition of diesel engine |
| CN115014772A (en) * | 2022-05-30 | 2022-09-06 | 武汉理工大学 | Constant-volume combustion bomb system for simulating direct injection in dual-fuel cylinder and control method thereof |
| CN115014773B (en) * | 2022-06-07 | 2023-09-26 | 哈尔滨工程大学 | Constant-volume combustion bomb control system, control method, equipment and medium based on LabVIEW |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204788958U (en) * | 2015-03-27 | 2015-11-18 | 天津大学 | Constant volume burning bullet system of simulation motor burning |
| CN105372072A (en) * | 2015-09-29 | 2016-03-02 | 华中科技大学 | Constant volume combustion bomb and combustion device with same |
| CN106939864A (en) * | 2017-03-23 | 2017-07-11 | 上海交通大学 | A kind of fuel injector adaptive device of adjustable angle |
| CN107727401A (en) * | 2017-10-18 | 2018-02-23 | 中北大学 | A kind of opposed-piston engine interferes spray test device |
| CN110579355A (en) * | 2019-08-16 | 2019-12-17 | 华中科技大学 | device and method for testing vibration performance of cooling oil in piston of internal combustion engine |
-
2020
- 2020-12-31 CN CN202011622383.8A patent/CN112834231B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204788958U (en) * | 2015-03-27 | 2015-11-18 | 天津大学 | Constant volume burning bullet system of simulation motor burning |
| CN105372072A (en) * | 2015-09-29 | 2016-03-02 | 华中科技大学 | Constant volume combustion bomb and combustion device with same |
| CN106939864A (en) * | 2017-03-23 | 2017-07-11 | 上海交通大学 | A kind of fuel injector adaptive device of adjustable angle |
| CN107727401A (en) * | 2017-10-18 | 2018-02-23 | 中北大学 | A kind of opposed-piston engine interferes spray test device |
| CN110579355A (en) * | 2019-08-16 | 2019-12-17 | 华中科技大学 | device and method for testing vibration performance of cooling oil in piston of internal combustion engine |
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