CN103056060B - Controlled resonant supersonic gas nozzle - Google Patents
Controlled resonant supersonic gas nozzle Download PDFInfo
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- CN103056060B CN103056060B CN201010215463.1A CN201010215463A CN103056060B CN 103056060 B CN103056060 B CN 103056060B CN 201010215463 A CN201010215463 A CN 201010215463A CN 103056060 B CN103056060 B CN 103056060B
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Abstract
The present invention relates to a kind of controlled resonant supersonic gas nozzle.It comprises a nozzle body, one piece of chassis, many group master drivers and secondary excitation device.The annular case of nozzle body to be a middle part be platform cone, middle part platform cone center has special-shaped vestibule, in conical cavity of falling from power on a leave from office conical cavity is connected in series.The annular case of nozzle body and the bottom surface of middle part platform cone and chassis are fitted and connected, and form a closed annular air storing cavity; Middle part platform cone has cross-hole more than two, wherein a through hole makes annular air storing cavity be communicated with conical cavity of falling from power, the port of export installs master driver, another through hole makes space on the upside of nozzle body be communicated with leave from office cone space, arrival end installs secondary excitation device, and the port of export connects leave from office conical cavity.The present invention not only can amplify the Gas Vibration effect of nozzle, exit flow and multishock can also be made to produce the pulsation of amplitude and frequency-adjustable or the forms of motion of pulsation and turn compound, can be used for the fields such as fluid atomizing, acoustics or power.
Description
Technical field
The present invention relates to a kind of controlled resonant supersonic gas nozzle.It can produce controlled high-intensity oscillation or whirling vibration air-flow.Jet atomization metallurgy, large intensity sound waves can be applied in or ultrasonicly involve the technical fields such as power.
Background technology
The present invention comes from the research to jet atomization metallurgical technology, but meaning of the present invention has surmounted this technology application itself.
Jet atomization metallurgical technology is metallurgical technology emerging over nearly twenty or thirty year, and quickly, wherein ultrasonic gas atomisation technology receives much concern because of the superior of its properties of product in development.The crucial part of technique is the high velocity air producing dither.And the producing cause of dither is owing to there is a kind of structure being referred to as Hartmann resonantron.Hartmann resonantron, also known as the Hartmann whistle, is made up of two-section tubule section, is blown into another pipeline section of bottom lock by one pipeline section, produces birdie.Hartmann resonantron has application much more very in reality, as utilized the flue dust sedimentation of its dither effect, fuel premix, ACTIVE CONTROL, noise suppression and jet atomization etc., utilizes the rocket igniter of its fuel factor, novel fridge refrigeration machine etc.
Hartmann resonantron has variform, USGA (Ultra-Sonic Gas Atomization) the nozzle US7118052B2 adopted in jet atomization metallurgical technology be exactly it one change.USGA nozzle can produce the supersonic airstream with dither, makes atomised product best in quality, has the feature that distribution of particles is concentrated.USGA nozzle has consequence at jet atomization metallurgical technology.
But, USGA nozzle also has the shortcoming of oneself.The gasflow mach number of its dither produced needs higher, and starting of oscillation difficulty is large, and the amplitude of vibration is less; Useful Gas Vibration has been constrained on the contrary when air velocity is very large; Vibration characteristics be nozzle processed out time just determine, can not regulate, the requirement under many situations can not be suitable for.
Summary of the invention
The object of the invention is to the defect existed for prior art, a kind of controlled resonant supersonic gas nozzle is provided, simple colour system, high strength, the unattenuated pressure wave of periodicity and flow can be obtained and involve pulse pneumatic or the turn of amplitude and frequency-adjustable control and compound motion air-flow of pulsing.
For achieving the above object, design of the present invention is:
Controlled resonant supersonic gas nozzle of the present invention, has nozzle body.
Nozzle body is the principal entities annular construction member of nozzle, and relevant cavity and passage are mainly arranged on nozzle body, and external side, upper surface and inner side form U-lag ring in fact.Inside nozzle body, entity part cross section is nearly right-angled trapezium shape, the anchor ring that its inclined side is formed forms U-lag ring interior sidewall surface, the anchor ring that vertical edges is formed forms the installed surface of master driver, the anchor ring that parallel short sides is formed forms the installed surface of secondary excitation device, and the anchor ring that parallel long limit is formed forms the perforate face of gas outlet end.Nozzle body interior annular entity has cross-shaped through hole more than two, and its perforate direction becomes vertical or parallel relation with master driver respectively with the installed surface of secondary excitation device.
Controlled resonant supersonic gas nozzle of the present invention, has chassis.
Chassis is a fast disc, and be the bottom surface of controlled resonant supersonic gas nozzle, the open face of chassis and U-lag ring engages, and forms the cavity closed; Chassis also can be designed as the integral structure be connected with nozzle body entity.
Controlled resonant supersonic gas nozzle of the present invention, has air storing cavity.
Air storing cavity is the cavity that chassis becomes with nozzle body U-lag collar, plays the stable cushioning effect becoming a mandarin and protect upstream equipment.
Controlled resonant supersonic gas nozzle of the present invention, has gas access.
Gas access is opened on outside nozzle body, can be one or more groups, it provide stable gas source, ensures the existence of controlled resonant supersonic gas nozzle operation medium; The gas of input is provided by external high-pressure air source.
Controlled resonant supersonic gas nozzle of the present invention, has master driver.
The effect of master driver produces controllable Gas Vibration, can be realized by zero-net-mass-flux jet device, can be made up of piezoelectric film oscillatory type, piston vibration formula, memorial alloy oscillatory type, acoustic wave excitation formula or other device that can produce airstream vibration, the amplitude of its signal, frequency and phase-adjustable control.
Controlled resonant supersonic gas nozzle of the present invention, has secondary excitation device.
The effect of secondary excitation device is collaborative master driver work, the effect of strengthening vibration.Also can be realized by zero-net-mass-flux jet, can be made up of piezoelectric film oscillatory type, piston vibration formula, memorial alloy oscillatory type, acoustic wave excitation formula or other device that can produce airstream vibration, the amplitude of its signal, frequency and phase-adjustable control.
Controlled resonant supersonic gas nozzle of the present invention, has cross-shaped through hole.
Cross-shaped through hole is made up of the through hole intersected vertically, cross-shaped through hole has four stomidiums, one points to U-lag ring interior sidewall surface, connect air storing cavity, the parallel short sides anchor ring of its two sensings right-angled trapezium, connecting secondary driver, the vertical edges anchor ring of its three sensings right-angled trapezium, connect master driver, it four is point to the parallel long side ring face of right-angled trapezium, forms gas vent.
Controlled resonant supersonic gas nozzle of the present invention, has gas outlet end.
Gas outlet end produces simple colour system, high strength, periodically unattenuated pressure wave and flow involve amplitude and frequency-adjustable control pulse pneumatic or turn and compound motion air-flow of pulsing.
According to foregoing invention design, the present invention adopts following technical proposals:
A kind of controlled resonant supersonic gas nozzle, it comprises a nozzle body, one piece of chassis, many group master drivers and secondary excitation device.The annular case of nozzle body to be a middle part be platform cone, the platform cone center in the middle part of it has special-shaped vestibule, and this special-shaped vestibule is conical cavity of falling from power on a leave from office conical cavity is connected in series; The annular case of described nozzle body and the bottom surface of middle part platform cone and described chassis are fitted and connected, and form a closed annular air storing cavity; In the middle part of described nozzle body, platform cone has cross-hole more than two, wherein a through hole make described annular air storing cavity be communicated with described special-shaped vestibule on to fall from power conical cavity, its port of export installs described master driver; And another through hole makes space on the upside of nozzle body be communicated with the leave from office cone space of described special-shaped vestibule, its arrival end installs described secondary excitation device, and the port of export connects leave from office conical cavity; Described nozzle body annular case lateral surface is provided with gas access, and gas is input to annular air storing cavity.
The pumping signal that above-mentioned master driver and secondary excitation device provide can be realized by zero-net-mass-flux jet device, and zero-net-mass-flux jet device is piezoelectric film vibration type device or piston vibration formula device or memorial alloy vibration type device or acoustic wave excitation formula device.
The signal that above-mentioned master driver and secondary excitation device provide, its amplitude, frequency, phase place are controlled, can in a synchronous manner or asynchronous system run, when driving frequency is the intrinsic frequency of cross passage, can resonance peak be obtained.Intrinsic frequency determined by the geometric properties of pipeline, usually more than one, the intrinsic frequency that local geometric factor causes can be divided into, its size can use f=c/ (4L) to estimate, wherein f is intrinsic frequency, c is local velocity of sound, and L is the effective length of the stomidium of the cross-shaped through hole connecting master driver; Also can be divided into the intrinsic frequency that the geometrical factor of the overall situation causes, its size is different according to each stomidium change in size of concrete cross passage, generally meter more difficult to estimate.
Each group of above-mentioned master driver, secondary excitation device, to can be with the use of, by adopting different pumping signal phase places, frequency, amplitude to produce different jet flow fields, be the air velocity distributions of steady flow condition or pulsatile flow field or pulsation and turn compound.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
Adopt the present invention to obtain supersonic airstream, by introducing controlled master, secondary excitation signal, utilizing the acoustic resonance characteristic in cross duct, making the pulsation of exit flow and multishock generation amplitude and frequency-adjustable, turn and pulsation compound motion.
Adopt device gas nozzle of the present invention to export vibrational energy and by excitation input input flow rate amplitude adjusted, can obtain the vibration amplitude more much bigger than the device not adding excitation.
Adopt device of the present invention still can starting of oscillation under comparatively low flow velocity and pressure, toggle speed be fast; When additional condition is constant, pressure wave and flow waves fluctuating range can not decay, and work can keep comparatively high stable level.
Thus, adopt the present invention can obtain controlled, stable, high strength, simple colour system gas amplitude, frequency, the pressure wave of phase-adjustable and flow waves, make nozzle gas jets according to preset or pulse compound or more complicated mode of general or pulsation or turn is moved.
Accompanying drawing explanation
The controlled resonant supersonic gas nozzle arrangements schematic diagram of Fig. 1.
Fig. 2 typical case jet motor pattern schematic diagram, wherein scheming (a) is general jet model; Figure (b) pulsation mode; Figure (c) turn pulsation mode.
Without pressure-wave emission calculating chart (one-period) during excitation in the single cross pipe of Fig. 3 typical case.
Pressure-wave emission calculating chart (one-period) in the single cross pipe of Fig. 4 typical case when master driver, secondary excitation device synergy.
Frequency-response amplitude calculating chart during the single cross pipe underexcitation of Fig. 5 typical case.
The opisometer nomogram of amplitude phase difference change when master driver, secondary excitation device signal exist phase difference in the single cross pipe of Fig. 6 typical case.
Fig. 7 exemplary actuator structural representation, wherein scheming (a) is piezoelectric film oscillatory type; Figure (b) is piston vibration formula; Figure (d) is memorial alloy oscillatory type; Figure (c) is acoustic wave excitation formula.
Detailed description of the invention
A preferred embodiment of the present invention accompanying drawings is as follows:
Embodiment one is see Fig. 1, and this controlled resonant supersonic gas nozzle, comprises a nozzle body 1, one piece of chassis 7, many group master drivers 3 and secondary excitation device 2.The annular case of nozzle body 1 to be a middle part be platform cone, the platform cone center in the middle part of it has special-shaped vestibule, and this special-shaped vestibule is conical cavity of falling from power on a leave from office conical cavity is connected in series; The annular case of described nozzle body 1 and the bottom surface of middle part platform cone and described chassis 7 are fitted and connected, and form a closed annular air storing cavity 4; In the middle part of described nozzle body 1, platform cone has cross-hole 8 more than two, wherein a through hole make described annular air storing cavity 4 be communicated with described special-shaped vestibule on to fall from power conical cavity, its port of export installs described master driver 3; And another through hole makes space on the upside of nozzle body 1 be communicated with the leave from office cone space of described special-shaped vestibule, its arrival end installs described secondary excitation device 2, and the port of export 6 connects leave from office conical cavity; The annular case lateral surface of described nozzle body 1 is provided with gas access 5, gas from gas entrance 5 enters air storing cavity 4, then enters cross-shaped through hole 8, after there is the gas responance of inside, duct, gas, in gas outlet end 6 ejection at a high speed, realizes the function of controlled resonant supersonic gas nozzle.
Embodiment two: see Fig. 1 and Fig. 2, the present embodiment is identical with embodiment one principle, special feature is: each group master driver 3, secondary excitation device 2 with the use of, by controlling phase place, frequency, the amplitude of pumping signal, produce dissimilar jet flow field: the steady flow condition that (a) is general; (b) pulsatile flow field; (c) pulsation and turn complex wake.
Embodiment three: see Fig. 1 and Fig. 3, the present embodiment is identical with embodiment one principle, and special feature is: give in typical single cross pipe without pressure-wave emission calculating chart (one-period) during excitation.Calculating parameter of getting is: import and export overall pressure tatio R=1.6, caliber D=3.6mm, resonance pipe range L=2D.Can see that in cross pipeline, stream pressure field is periodically pulsing feature.
Embodiment four: see Fig. 1 and Fig. 4, the present embodiment is identical with embodiment one principle, geometric parameter is identical with embodiment three, special feature is: there is pumping signal, selected by pressure-wave emission calculating chart (one-period) driver when Fig. 4 gives master driver in typical single cross pipe, secondary excitation device acts synergistically, parameter is: driving frequency f=nozzle intrinsic frequency (10895Hz), excitation amplitude is A=0.1, and phase difference is 0.Can see that in cross pipeline, stream pressure field is that periodically pulsing feature is significantly different from the result in embodiment three.
Embodiment five: see Fig. 1 and Fig. 5, the present embodiment is identical with embodiment one principle, geometric parameter is identical with embodiment three, the amplitude of excitation is identical with embodiment four with phase difference parameter, special feature is: the frequency of excitation is change, and Fig. 5 gives frequency-response amplitude calculating chart during typical single cross pipe underexcitation.Show different driving frequencies, the pressure-responsive of acquisition and mass flowrate response are different, and there is multiple peak value, and namely resonance can occur in multiple frequency.
Embodiment six: see Fig. 1 and Fig. 6, the present embodiment is identical with embodiment one principle, geometric parameter is identical with embodiment three, the amplitude of excitation is identical with embodiment four with frequency parameter, special feature is: master driver and secondary excitation device apply signal phase difference be change, the opisometer nomogram of amplitude phase difference change when Fig. 6 gives master driver in typical single cross pipe, secondary excitation device signal exists phase difference.Can see that the existence of driver phase difference exists very large impact to pressure-responsive and mass flowrate response.
Embodiment seven: see Fig. 1 and Fig. 7, the present embodiment is identical with embodiment one principle, special feature is: above-mentioned Active spurring device 3 and secondary excitation device 2 are ACTIVE CONTROL parts, for zero-net-mass-flux jet generator, can be made up of piezoelectric film oscillatory type (figure (a)) or piston vibration formula (figure (b)) or acoustic wave excitation formula (figure (c)) or memorial alloy oscillatory type (figure (d)) or other component that can produce airstream vibration.
Claims (3)
1. a controlled resonant supersonic gas nozzle, comprises a nozzle body (1), and one piece of chassis (7) is organized master driver (3) and secondary excitation device (2) more, be it is characterized in that:
1) the annular case of described nozzle body (1) to be a middle part be platform cone, the platform cone center in the middle part of it has special-shaped vestibule, and this special-shaped vestibule is conical cavity of falling from power on a leave from office conical cavity is connected in series; The annular case of described nozzle body (1) and the bottom surface of middle part platform cone and described chassis (7) are fitted and connected, and form a closed annular air storing cavity (4);
2) described nozzle body (1) middle part platform cone has cross-hole more than two (8), wherein a through hole make described annular air storing cavity (4) be communicated with described special-shaped vestibule on to fall from power conical cavity, its port of export installs described master driver (3); And another through hole makes space, nozzle body (1) upside be communicated with the leave from office cone space of described special-shaped vestibule, its arrival end installs described secondary excitation device (2), and the port of export (6) connects leave from office conical cavity;
3) the annular case lateral surface of described nozzle body (1) is provided with gas access (5), gas is input to annular air storing cavity (4).
2. controlled resonant supersonic gas nozzle according to claim 1, it is characterized in that described master driver (3) and secondary excitation device (2) pumping signal are realized by zero-net-mass-flux jet device, this master driver (3) and secondary excitation device (2) are piezoelectric film oscillatory type exciting bank or piston vibration formula exciting bank or memorial alloy oscillatory type exciting bank or acoustic wave excitation formula exciting bank, and the phase place of its excitation amplitude, frequency and signal can regulate.
3. controlled resonant supersonic gas nozzle according to claim 1, is characterized in that the gas of the annular air storing cavity of described input (4) is provided by external high pressure source of the gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010215463.1A CN103056060B (en) | 2010-06-29 | 2010-06-29 | Controlled resonant supersonic gas nozzle |
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| CN201010215463.1A CN103056060B (en) | 2010-06-29 | 2010-06-29 | Controlled resonant supersonic gas nozzle |
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| CN103056060A CN103056060A (en) | 2013-04-24 |
| CN103056060B true CN103056060B (en) | 2015-07-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104353838B (en) * | 2014-10-17 | 2015-11-25 | 同济大学 | The ultrasonic nebulization jet nozzle of a kind of secondary laval and hartmann structure fusion |
| CN107983557B (en) * | 2017-12-15 | 2020-01-21 | 北京顺鑫绿洲锦绣园林工程有限公司 | Dot-matrix green plant spraying device and method |
| CN110052340B (en) * | 2019-04-01 | 2024-03-19 | 江苏大学 | Multistage ultrasonic atomization spraying device |
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| US2832545A (en) * | 1955-03-03 | 1958-04-29 | Exxon Research Engineering Co | Supersonic jet grinding means and method |
| US3232267A (en) * | 1963-02-25 | 1966-02-01 | Sonic Dev Corp | Sonic pressure wave generator |
| CN1507374A (en) * | 2001-05-09 | 2004-06-23 | 诺威尔技术方案有限公司 | Method and apparatus for atomising liquid media |
| CN2729593Y (en) * | 2004-03-12 | 2005-09-28 | 大连理工大学 | Multi-pipe fluidic oscillating refrigerating machine |
| EP2027934A1 (en) * | 2007-07-25 | 2009-02-25 | Schott Corporation | Method for spray-forming melts of glass and glass-ceramic compositions |
| CN101436402A (en) * | 2008-12-04 | 2009-05-20 | 上海大学 | Crisscross gas resonance frequency generator |
| CN101511146A (en) * | 2009-03-31 | 2009-08-19 | 北京航空航天大学 | Zero mass jet flow exciter of medium countercheck discharging plasma |
-
2010
- 2010-06-29 CN CN201010215463.1A patent/CN103056060B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2832545A (en) * | 1955-03-03 | 1958-04-29 | Exxon Research Engineering Co | Supersonic jet grinding means and method |
| US3232267A (en) * | 1963-02-25 | 1966-02-01 | Sonic Dev Corp | Sonic pressure wave generator |
| CN1507374A (en) * | 2001-05-09 | 2004-06-23 | 诺威尔技术方案有限公司 | Method and apparatus for atomising liquid media |
| CN2729593Y (en) * | 2004-03-12 | 2005-09-28 | 大连理工大学 | Multi-pipe fluidic oscillating refrigerating machine |
| EP2027934A1 (en) * | 2007-07-25 | 2009-02-25 | Schott Corporation | Method for spray-forming melts of glass and glass-ceramic compositions |
| CN101436402A (en) * | 2008-12-04 | 2009-05-20 | 上海大学 | Crisscross gas resonance frequency generator |
| CN101511146A (en) * | 2009-03-31 | 2009-08-19 | 北京航空航天大学 | Zero mass jet flow exciter of medium countercheck discharging plasma |
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