CN201610802U - Knocking tube of a spiral type pulse knocking engine - Google Patents
Knocking tube of a spiral type pulse knocking engine Download PDFInfo
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- CN201610802U CN201610802U CN2010201092205U CN201020109220U CN201610802U CN 201610802 U CN201610802 U CN 201610802U CN 2010201092205 U CN2010201092205 U CN 2010201092205U CN 201020109220 U CN201020109220 U CN 201020109220U CN 201610802 U CN201610802 U CN 201610802U
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Abstract
The utility model discloses a knocking tube of a spiral type pulse knocking engine, capable of reducing the axial distance of the knocking tube and the axial length of the pulse knocking engine using the spiral type structure. Because the knocking tube is the spiral structure, when the air stream flows near to an oil nozzle, a radial and circumferential secondary flow is generated due to the centrifugal force and the oil mist is backwards sprayed from the oil nozzle to increase the mixing degree of the oil gas and be favorable for completely burning the fuel. After mixing the oil gas, the combustible mixed gas is ignited by a spark plug to form deflagration. Because the speed of the combustion gas is far larger than the air flow speed at the inlet of the knocking tube, the radial and circumferential speed of the secondary flow are increased and the spiral groove increases the turbulivity in the tube and makes the combustion gas furthermore rotate, so as to shorten the change distance from the deflagration to knocking and increase the reliability of the knocking tube.
Description
Technical field
The utility model relates to a kind of detonation tube that utilizes detonation wave to produce the spiral pulse-knocking engine of thrust.
Background technique
As everyone knows, pulse-knocking engine is 21 century one of the most promising revolutionary Aero-Space power.It is based on the new ideas of knocking combustion, have simple in structure, size is little, Applicable scope is wide, low cost and other advantages, thrust weight ratio can reach 20.Pulse-knocking engine both can be used as the power of small aircraft, target drone and unmanned plane, also can be used as the power of spiral tip-driven rotor machine, the following advancing means that also may be used as military-civil aircraft even high high-altitude vehicle.
The periodic detonation wave that the pulse-knocking engine detonation tube produces can make the combustion gas supercharging, heats and pushes the speed, thereby provide thrust for motor.The thrust of the big more generation of the frequency of okperation of pulse-knocking engine detonation tube is big more in theory.Producing under the situation of pinking, the length of the detonation tube weight of puffer more is just light more, and then thrust weight ratio is just big more.The frequency of okperation and the chopped pulse detonation engine detonation tube length that how to improve the pulse-knocking engine detonation tube are the directions that a lot of researchers make great efforts.
Traditional pulse-knocking engine detonation tube is a straight pipe basically, though can change to some extent at the diverse location caliber of detonation tube, structure such as jet pipe for example, central axis is constant.This just makes detonation tube very long in the axial direction, and what have reaches 2 meters.Detonation tube is long more, and filling time that can quick-fried mixed gas is just long more, and frequency of okperation just is affected.And can make the length of aircraft elongated, increased weight.Detonation tube is long more, and its vibration problem is just obvious more outstanding.
The traditional pulse-knocking engine detonation tube only Shchelkin spiral of inner portion (a kind of spring helix structure) still is exposed in the hot combustion gas when detonation tube is worked for a long time as the pinking intensifier, can occur the problem of ablating after working long hours.Fall in case the Shchelkin spiral is ablated in detonation tube, whole pulse-knocking engine detonation tube just is difficult to form pinking, can not produce thrust.Though being it, another shortcoming of Shchelkin spiral utilize solid obstacle to increase the interior turbulivity of detonation tube, but solid obstacle itself has but increased the flow resistance of air-flow in the detonation tube, make can the quick-fried mixed gas filling time elongatedly, cause detonation frequency to reduce, reduce the thrust that detonation chamber produces.
The injection direction of the injection direction of traditional pinking air in tube and fuel oil generally be coaxial in the same way.Though the filling speed of gas mixture is accelerated, and the blending degree of oil gas is lower, be unfavorable for also just not having enough energy on short distance, to form detonation wave very much to the making full use of of fuel, be unfavorable for the shortening of detonation engine detonation tube length.And igniting is also unstable, may can not form pinking in some circulations.In addition, because traditional pulse-knocking engine detonation tube is columniform, when many in parallel uses of pipe, be installed in parallel, will certainly waste a lot of spaces, make the diameter of motor of multitube become very big, use and must be that many detonation tubes are in parallel in practice.
The model utility content
Problems such as the utility model is big at the size of the detonation tube of straight circular pipe type pulse-knocking engine of the prior art, fuel availability is lower, a kind of detonation tube of spiral pulse-knocking engine is provided, and detonation tube can shorten the length of detonation engine detonation tube effectively and reduce the diameter of multi-pipe impulse detonation engine.
For solving its technical problem, the detonation tube of the spiral pulse-knocking engine of the utility model comprises detonation tube, oil nozzle and spark plug.Described detonation tube is a sped structure, respectively there is straight-run of pipe formula structure in the inlet of detonation tube and outlet port, oil nozzle is installed on the spiral detonation tube tube wall of detonation tube front end, spark plug be installed in apart from oil nozzle backward 1/4th detonation tube spirals weeks strong point the spiral tube wall of detonation tube on, be equipped with helical groove on the inwall of spiral tube wall after spark plug of detonation tube.
The oil spout direction of the oil nozzle of installing is tangent with the helix of detonation tube and opposite with airflow direction.
The detonation tube of the spiral pulse-knocking engine of the utility model, it has reduced the axial distance of detonation tube greatly by adopting sped structure, has shortened the axial length of pulse-knocking engine.Because detonation tube is screw type structure, air-flow owing to action of centrifugal force has produced radially and circumferential secondary flow, has a lot of vortexs near flowing to oil nozzle the time in the air-flow.Because it is upstream injection that oil nozzle sprays mist of oil,, help the abundant burning of fuel so this has just improved the mixability of oil gas greatly.After the oil gas mixing finished, flammable mixed gas formed detonation by spark ignitor.Because the speed of combustion gas is much larger than the airspeed of detonation tube import, thus its secondary flow radially will be bigger with circumferential speed.The turbulivity of helical groove on the inwall of spiral tube wall after spark plug of detonation tube in increasing pipe, can also play the effect that is similar to rifling in the rifle gun barrel, can make the combustion gas of flowing through further rotation upwards take place, shorten then from the transition distance of detonation to pinking in week; Simultaneously helical groove need not be considered the problem cooled off, has prolonged the life-span of detonation tube, has increased the reliability of detonation tube.
Description of drawings
Be described in further detail below in conjunction with the detonation tube of accompanying drawing the spiral pulse-knocking engine of the utility model.
Fig. 1 is the structural representation of the detonation tube of the spiral pulse-knocking engine of the utility model.
Fig. 2 is the structural representation of the detonation tube spiral inner wall groove among the utility model Fig. 1.
1. detonation tube 2. helical grooves 3. oil nozzles 4. spark plugs
Embodiment
Fig. 1 is the structural representation of the detonation tube of the spiral pulse-knocking engine of the utility model, and it includes detonation tube 1, oil nozzle 3 and spark plug 4.Described detonation tube 1 is a sped structure, respectively there is straight-run of pipe formula structure in the inlet of detonation tube 1 and outlet port, oil nozzle 3 is installed on the spiral tube wall of detonation tube 1 front end, spark plug 4 is installed in apart from oil nozzle 3 backward on the spiral tube wall of the detonation tube 1 at 1/4th girth places, and the inwall after the spiral tube wall spark plug 4 of detonation tube 1 is provided with helical groove 2.
The oil spout direction of the oil nozzle of being installed 3 is tangent with the helix of detonation tube 1 and opposite with airflow direction.
The detonation tube of described spiral pulse-knocking engine, during its work, because detonation tube 1 is screw type structure, thus air-flow near flowing to oil nozzle 3 fitting seats the time owing to action of centrifugal force has produced radially and circumferential secondary flow, have a lot of vortexs in the air-flow.Adding mist of oil is upstream injection, so can improve the mixability of oil gas greatly, helps the abundant burning of fuel.After the oil gas mixing finished, flammable mixed gas was lighted by spark plug 4, formed detonation.Because the speed of combustion gas is much larger than the airspeed of detonation tube 1 import, so its secondary flow radially will be bigger with circumferential speed, helical groove 2 on the inwall of spiral tube wall after spark plug 4 of detonation tube can increase the turbulivity in the pipe, can also make the combustion gas of flowing through upwards produce further rotation, thereby shorten transition distance to pinking in week.
As shown in Figure 2, the spiral tube wall of detonation tube 1 is equipped with helical groove 2 on spark plug 4 inwall backward.The turbulivity of its helical groove 2 in increasing pipe, can also play the effect that is similar to rifling in the rifle gun barrel, can make the combustion gas of flowing through upwards produce further rotation, shorten then from the transition distance of detonation to pinking in week; Simultaneously helical groove 2 need not be considered the problem cooled off, has prolonged the life-span of detonation tube, has increased the reliability of detonation tube.
Claims (3)
1. the detonation tube of a spiral pulse-knocking engine, comprise detonation tube, oil nozzle and spark plug, it is characterized in that: described detonation tube (1) is a sped structure, respectively there is straight-run of pipe in its inlet and outlet port, oil nozzle (3) is installed on the spiral tube wall of detonation tube (1) front end, spark plug (4) be installed in apart from oil nozzle (3) backward 1/4th detonation tube spirals weeks strong point tube wall on.
2. the detonation tube of spiral pulse-knocking engine according to claim 1, it is characterized in that: the oil spout direction of the oil nozzle of being installed (3) is tangent and opposite with airflow direction with the helix of detonation tube (1).
3. the detonation tube of spiral pulse-knocking engine according to claim 1, it is characterized in that: the spiral tube wall of detonation tube (1) is equipped with helical groove (2) on spark plug (4) inwall afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201092205U CN201610802U (en) | 2010-02-04 | 2010-02-04 | Knocking tube of a spiral type pulse knocking engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201092205U CN201610802U (en) | 2010-02-04 | 2010-02-04 | Knocking tube of a spiral type pulse knocking engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201610802U true CN201610802U (en) | 2010-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201092205U Expired - Fee Related CN201610802U (en) | 2010-02-04 | 2010-02-04 | Knocking tube of a spiral type pulse knocking engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201610802U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174913A (en) * | 2011-03-03 | 2011-09-07 | 西北工业大学 | Pulse detonation engine with ejector and method for processing main detonation tube |
| CN103075271A (en) * | 2013-01-21 | 2013-05-01 | 西北工业大学 | High-frequency conical spiral tube type pulse detonation engine |
| CN106812627A (en) * | 2017-03-20 | 2017-06-09 | 西北工业大学 | A kind of pinking tubular construction of rotating air suction formula pulse-knocking engine |
| CN106948970A (en) * | 2017-03-22 | 2017-07-14 | 西北工业大学 | A kind of pinking tubular construction of rotation impulse detonation engine |
| CN107191290A (en) * | 2017-04-19 | 2017-09-22 | 西北工业大学 | A kind of dynamic power machine of the spiral pulse-knocking engine of application |
| CN109184949A (en) * | 2018-09-25 | 2019-01-11 | 西北工业大学 | A kind of detonation tube structure of the spiral pulse-knocking engine of indirect igniting |
-
2010
- 2010-02-04 CN CN2010201092205U patent/CN201610802U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174913A (en) * | 2011-03-03 | 2011-09-07 | 西北工业大学 | Pulse detonation engine with ejector and method for processing main detonation tube |
| CN103075271A (en) * | 2013-01-21 | 2013-05-01 | 西北工业大学 | High-frequency conical spiral tube type pulse detonation engine |
| CN103075271B (en) * | 2013-01-21 | 2015-04-22 | 西北工业大学 | High-frequency conical spiral tube type pulse detonation engine |
| CN106812627A (en) * | 2017-03-20 | 2017-06-09 | 西北工业大学 | A kind of pinking tubular construction of rotating air suction formula pulse-knocking engine |
| CN106948970A (en) * | 2017-03-22 | 2017-07-14 | 西北工业大学 | A kind of pinking tubular construction of rotation impulse detonation engine |
| CN106948970B (en) * | 2017-03-22 | 2018-10-02 | 西北工业大学 | A kind of detonation tube structure of rotation impulse detonation engine |
| CN107191290A (en) * | 2017-04-19 | 2017-09-22 | 西北工业大学 | A kind of dynamic power machine of the spiral pulse-knocking engine of application |
| CN109184949A (en) * | 2018-09-25 | 2019-01-11 | 西北工业大学 | A kind of detonation tube structure of the spiral pulse-knocking engine of indirect igniting |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101020 Termination date: 20130204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |