CN106640421A - Side-exhausting pulse detonation engine - Google Patents

Abstract

The invention discloses a side-exhausting pulse detonation engine. The pulse detonation engine is at least composed of a head cone, a detonation pipe, lateral air inlet valves, lateral air exhaust valves, main fuel nozzles, detonation fuel nozzles and an igniter, wherein the two ends of the detonation pipe are sealed, and the detonation pipe is divided into a main detonation chamber at the front part and a blasting chamber at the rear part by a sieve plate; the blasting chamber comprises a mouse cage component; the lateral air inlet valves and the lateral air exhaust valves are alternately arranged on the pipe wall of the detonation pipe in the axial direction; the main fuel nozzles and the detonation fuel nozzles are distributed on the pipe inner wall of the detonation pipe in the axial direction; when the engine works, multiple main fuel nozzles spray atomized fuels into the main detonation chamber, at the same time the detonation fuel nozzles spray gasified detonation fuels into the blasting chamber; the igniter detonates the explosive gas mixture in the blasting chamber and then detonates the mist-shape mixture in the main detonation chamber, and generated shock waves generate main thrust on a thrust wall; the explosive gas products are ejected backwards from the multiple lateral air exhaust valves to generate further thrust; an outer duct can be additionally arranged outside the detonation pipe, so that the resistance generated in high-speed flight is reduced.

Description

A kind of pulse-knocking engine of side exhaust

Technical field

The present invention relates to aero-engine technology field, and in particular to a kind of pulse-knocking engine of side exhaust.

Background technology

Pulse-knocking engine (Pulse Detonation Engine abbreviation PDE) is with detonation wave as main thrust New concept engine is planted, when engine works, fuel is burnt in the detonation chamber of engine in violent pinking mode, extremely short Very high temperature and pressure is produced in time（Pressure may be up to 100 atmospheric pressure, and temperature is up to 2000 DEG C）, while what is produced is quick-fried Seismic wave (category shock wave) is with supersonic speed propagation（Thousands of meter per seconds）Act on and thrust, HTHP are produced on the thrust wall of engine Combustion product produce extra thrust when spraying engine at a high speed;Because detonating combustion is the burning of intermittent pulses formula, so should Engine is a kind of unsteady propulsion system.Relative to traditional propulsion system, PDE has the advantages that a series of uniquenesses, due to quick-fried The pressure and temperature of explosive mixture can be increased to very high degree by seismic wave in very short time, therefore eliminate tradition Motivation is used for the part (such as compressor) being pressurized, and makes the structure of engine and becomes very simple, and amount of parts greatly reduces, because This pulse-knocking engine size is little, lightweight, and in addition the combustion process of PDE is approximately isochoric combustion, and the thermal efficiency is reached as high as 49%, far above the thermal efficiency (27%) of conventional engines.These features of PDE make it have widely in Aeronautics and Astronautics field Application prospect, it is estimated that, the thrust-weight ratio of PDE up to 20, range of Mach numbers 0 ~ 10（Air suction type is 0 ~ 5）, flying height scope 0 ~ 50km, thrust range 0.5kg ~ 50000kg.The rotary part that PDE is not easily damaged, therefore structure is simpler, safeguard and more hold Easily.It can as guided missile, target drone, bait machine, UAV, UCAV power, it can also be used to manned aircraft Power set, realize the intercontinental navigation of high speed；Space craft propulsion is possibly used in the future, as lunar lander, interspace trip Swim aircraft or enter the power of orbit aerocraft, revolution will be brought to space transoportation；In recent years its civil area application, Attention is also result in, such as high efficiency generating.It is contemplated that, once detonation engine technology maturation, will navigate to aviation It and energy field produce revolutionary impact.

According to the number of PDE detonation tubes, PDE can be divided into single tube/multitube PDE, and according to fuel forms gas phase and liquid phase can be divided into Fuel PDE, according to the source of oxidant Self inhaling type/rocket type PDE can be divided into；Can be divided into no-valve type according to intake method（Gas Dynamic formula）And have valve type（Such as rotary valve）PDE.According to application mode, PDE can be divided into pure PDE (pure PDE), combined PDE (combined PDE), hybrid PDE (hybrid PDE) three major types.Pure PDE is mainly made up of detonation tube, air intake duct, jet pipe； Hybrid PDE is by PDE in combination with turbojet or turbofan, such as to use PDE in by-pass air duct or reinforcing section；Combination PDE be by PDE is combined with conventional engines such as punching engine, scramjet engine, rocket engine equal power device, not In same velocity interval, different working cycles are run；It has in common that fuel is with air mixture in the way of pinking Burning, this violent course of reaction produces high temperature and high pressure gas, after cycle frequency reaches to a certain degree（About 100 hertz）, just Approximately continuous thrust can be provided.

Fuel quickly and reliably detonates with the mixture of air, is the important prerequisite of PDE normal works, and detonation mode has Two kinds, one kind is direct initiation, and one kind is detonation indirectly, i.e., develop into pinking by detonation（DDT）；Former mode needs high Ignition energy, the requirement to ignition installation is very high, does not possess practicality, therefore typically adopts latter approach；So, fuel is empty How quickly the detonation problem of gas mixture is just concentrated on to realize detonation in the conversion of pinking.

Air is the action that must complete before DDT to flow with the good blending of fuel, and the air intake duct of current PDE is each provided at sending out Foremost, air flows into detonation chamber to motivation from front end, forms fuel air mixture after fully blending with the fuel for spraying into, so Detonate in main shot room through DDT afterwards, to prevent detonation wave or combustion product from causing air inlet exception, PDE generally to need into air intake duct One isolated area is set between air intake duct and detonation chamber；It is mechanical valve type PDE and pneumatic by PDE point according to isolation method Valve type PDE；Mechanical valve in detonation, pinking propagation and exhaust process, valve closing, valve is opened during air inlet；Mechanical valve is asked Topic can be fed air flue and cause very big windward side, air to produce very big resistance damage come the stagnation for flowing when being valve closing Lose；At present the mechanical valve of comparative maturity is rotary valve, needs special driven by power, and the sealing of rotary valve is highly difficult, mill Damage serious, in addition rotary valve is confined to multitube PDE occasions；Pneumatic operated valve then utilizes aerodynamic principle, realizes positive flow resistance Little, the big function of reverse flow resistance, formation is similar to the effect closed, and advantageously forms detonation wave, but existing pneumatic operated valve pattern Completely enclosed effect is still unable to reach, is still had a small amount of combustion product reversely to flow out air intake duct from air intake duct and is formed negative thrust, Meanwhile, the presence of pneumatic operated valve inevitably affects the design of thrust wall so as to can not be in optimal working condition.This Outward, in order to shorten DDT distances, current PDE using the measure of some reinforcing detonations, such as adopts Shchelkin spiral, metal Ring, orifice plate, centerbody etc.；Although these measures are conducive to fuel blending and shorten DDT distances, but while also have impact on positive quick-fried The propagation of seismic wave, causes very big thrust loss, and this is the problem that can not be ignored.

In addition, the ejection of pinking after-explosion gaseous product, the operating mode of pulse detonation engine also has a major impact；Exhaust Time is too short, causes residual explosion gas product in detonation tube excessive, and the filling effect of impact fresh air can make pipe when serious Interior oxygen content is not enough and cause cannot ignite fuel gas mixture；Evacuation time is long, then reduce the detonation frequency of engine so as to drop Low-thrust；The detonation tube of traditional pulse detonation engine is longer, and internal diameter is less, and the explosion gas product of HTHP is long and narrow Detonation tube in move to nozzle, easily produce flow choking, have a strong impact on the normal work of engine.

For the various defects that current PDE is present, the invention provides a kind of pulse-knocking engine of side exhaust, its master Want the feature to be, arrange on the tube wall of detonation tube multiple side air bleeding valves every a segment distance vertically, side row during pinking Air valve is closed, and pinking terminates rear side air bleeding valve moment and is opened, side exhaust of the explosion gas product along special design Spray after mouth is oblique, produce augmented thrust；Because side exhaust outlet number is more, exhaust velocity is higher by than traditional nozzle exhaust mode Manyfold, so as to substantially reduce evacuation time, to improving the detonation frequency of engine and then improving the thrust of engine very It is beneficial.

The content of the invention

The technical problem to be solved is to overcome traditional pulse detonation engine jet pipe exhaust mode to exist Air-flow congestion, the low defect of evacuation time length, detonation frequency, there is provided it is a kind of can the side exhaust pulses pinking that is vented simultaneously of multiple spot Engine, can significantly shorten evacuation time, detonation frequency be increased substantially, so as to greatly improve motor power.

A kind of pulse-knocking engine of side exhaust, at least by nose cone 1, detonation tube 2, side valve 3, side air bleeding valve 4, master Fuel nozzle 5, detonation fuel nozzle 6 and igniter 7 are constituted；Detonation tube 2 is the pipe of closed at both ends, and drive end bearing bracket is flat board end Lid, plays the effect of thrust wall, and rear end cap is hemispherical end cap；Detonation tube 2 is divided into main shot room 201 and blasting chamber by one piece of sieve plate 202 203；Front, blasting chamber 203 is rear for main shot room 201；Open pipe 2031 of the blasting chamber 203 comprising a tube wall perforate, pipe One mouse cage component 2032 of filling in 2031；Side valve 3 is arranged alternately vertically in the tube wall of detonation tube 2 with side air bleeding valve 4 On；Main fuel spray nozzle 5 is mounted in vertically on the tube wall of main shot room 201；Detonation fuel nozzle 6 is loaded on pipe 2031 in blasting chamber 203 Tube wall on；When engine works, multiple main fuel spray nozzles 5 spray into atomized fuel in main shot room 201, while fuel spray of detonating Mouth 6 sprays into vaporising fuel into blasting chamber 203, and the igniter 7 in blasting chamber 203 is lighted a fire, and ignites fuel gas mixture therein, quick-fried Collect laggard becoming owner of in shot room 201, and then the main shot room 201 of ignition in hole of the fried high temperature and high pressure gas for producing on sieve plate 202 Cloud mixture；Act on first when the shock wave of generation is propagated forward on the valve block of side valve 3 and side air bleeding valve 4, by side Intake valve 3 and side air bleeding valve 4 are closed, and finally produce impulse force in front blind end；When shock wave is produced instead on front Closed End Penetrate along the inverse time folded back upon of detonation tube 2, under reflected shock wave and expanded gas flow impact, side air bleeding valve 4 is opened, explosion product gas Spray after oblique, produce augmented thrust；While explosion gas product in main shot room 201 and blasting chamber 203 is discharged, pinking Pressure is decreased in pipe 2, and when overpressure is reduced to a certain extent, side valve 3 is opened, and is managed outer fresh air and is entered master Shot room 201 and blasting chamber 203, main fuel spray nozzle 5 and detonation fuel nozzle 6 are again respectively into main shot room 201 and blasting chamber 203 Fuel is sprayed into, igniter 7 is lighted a fire again, pulse-knocking engine enters next round detonation cycle.

The inside pipe wall of described main shot room 201 is carved with vertically groove, and the quantity of groove is no less than 3.

Pore size distribution on described sieve plate 202 on one group of concentric circles, the centerline direction in each hole and detonation tube axis Intersecting, the centerline direction in hole meets at a bit on same circle, and the intersection point of the center line in cylindrical upper hole is with a distance from sieve plate compared with inner circle The intersection point in upper hole is remote.

At least one intake and exhaust integral valve 2034 is housed at the described proximal cover of blasting chamber 203 on tube wall.

Further, air inlet is opened simultaneously with exhaust outlet during described intake and exhaust 2034 air inlet of integral valve, can be discharged residual The explosion product gas for staying；During pinking, intake and exhaust integral valve 2034 is in the closed position.

Equipped at least with a side valve 3 and a side air bleeding valve 4 on described blasting chamber 203.

Described mouse cage component 2032 is formed by several coaxial cylindrical shape mouse cages with holder combination, is rigid member.

Described side valve 3 is connected with an air intake duct 301 on tube wall；Air intake duct 301 can be supersonic speed air inlet Road, it is also possible to be subsonic inlet.

Described side air bleeding valve 4 includes two valve blocks, the valve block 401 in a pipe, the valve block 402 outside a pipe, pipe Interior valve block 401 can swing, so as to turn off or on air bleeding valve.

Described detonation tube 2 can install by-pass air duct 8 additional, and by-pass air duct 8 includes air intake duct 801, ring cavity 801 and jet pipe 803.

The invention has benefit that：1, side valve is capable of achieving multiple spot air inlet simultaneously, significantly reduces inlet period； Side air bleeding valve is capable of achieving multiple spot and is vented simultaneously, being jammed for the interior high temperature and high pressure gas product of pipe is overcome, when significantly reducing exhaust Between, so as to significantly improve the detonation frequency of engine, greatly improve the thrust of engine；2, blasting chamber filling mouse cage component shows Writing increases the turbulence of air-flow, and its huge surface area provides the focus of enormous amount, while as heat transfer member, dramatically increasing Air and the temperature of detonation fuel, each contribute to quickly produce detonation；3, the porous sieve plate of particular design can produce cumulative effect Should, form high-voltage high-speed jet, hence it is evident that strengthen initiating ability；4, the groove on main shot room tube wall can substantially strengthen air and rise The mixing of detonation material, forms sufficient turbulent flow, makes the detonation in pipe be more easy to stable propagation；5, intake valve is equal with the keying of air bleeding valve It is that the shock wave that produced by pinking and pressure are carried out automatically, response is rapid, without special control system and does device, engine Operation is relatively reliable, durable；6, detonation tube simple structure includes component seldom, especially in positive detonation wave propagation, does not produce Harmful shock wave refraction or reflection, the loss of thrust is reduced to a minimum.

Description of the drawings

Fig. 1 is the section of structure of exhaust pulses detonation engine in side of the present invention.

The profile that Fig. 2 is rotated by 90 ° for Fig. 1.

Fig. 3 is that exhaust detonation engine in side of the present invention installs the section of structure after by-pass air duct additional.

Fig. 4 is A-A profiles in Fig. 1.

Fig. 5 is B-B profiles in Fig. 2.

Fig. 6 is C-C profiles in Fig. 2.

Specific embodiment

With reference to embodiments the present invention is described in further detail.

As shown in Fig. 1 ~ 6, the pulse-knocking engine of side exhaust is mainly made up of following part：Nose cone 1, detonation tube 2, Side valve 3, side air bleeding valve 4, main fuel spray nozzle 5, detonation fuel nozzle 6 and igniter 7, install the engine of by-pass air duct 8 additional also Including air intake duct 801, ring cavity 802 and jet pipe 802；The described two ends of detonation tube 2 are closed, and drive end bearing bracket is flat board end cap, is risen Thrust wall is acted on, and rear end cap is hemispherical end cap, and detonation tube 2 is divided into main shot room 201 and blasting chamber 203 by one piece of sieve plate 202, main Front, blasting chamber 203 is rear for shot room 201；Groove is carved with the inside pipe wall of main shot room 201, groove is evenly distributed；The number of groove Amount determines according to the internal diameter size of detonation tube 2, but must not be less than 3, and 16 are selected in this example；Groove can substantially strengthen sky Gas and the mixing of main fuel, form sufficient turbulent flow, make the detonation in pipe be more easy to stable propagation；Through hole distribution on sieve plate 202 On one group of concentric circles, the centerline direction of each through hole intersects with the axis of detonation tube, the center line side of through hole on same circle To meeting at a bit, the intersection point of the center line of cylindrical upper through hole is remote compared with the intersection point of through hole in inner circle with a distance from sieve plate, is so set The through hole of meter can collect explosion product for the jet of one high speed and high pressure, to igniting the cloud fuel in main shot room 201 Mixture is highly beneficial；Pipe 2031 of the blasting chamber 203 comprising a tube wall perforate, one mouse cage component of filling in pipe 2031 2032, the component is formed by several coaxial cylindrical shape mouse cages with holder combination, is rigid member, there is huge surface area, can The huge focus of quantity of formation, can acceleration knock generation, pipe 2031 is fixed on blasting chamber 203 by tubular bracket 2033 On tube wall；At least one intake and exhaust integral valve 2034, intake and exhaust integral valve during air inlet are housed at the proximal cover of blasting chamber 203 on tube wall 2034 air inlet is opened simultaneously with exhaust outlet, can exclude the explosion product gas of residual；During pinking, intake and exhaust integral valve 2034 is in the closed position；Side valve 3 is arranged alternately vertically on the tube wall of detonation tube 2 with side air bleeding valve 4, side valve 3 For check valve, open and be open towards nose cone towards in pipe during air inlet；In shock wave and the pressure of explosion gas product during pinking It is closed under effect；Each side valve 3 is connected with the air intake duct 301 on a tube wall, the import of air intake duct 301 Supersonic inlet or subsonic inlet can be designed to according to the use requirement of engine；Side air bleeding valve 4 includes two valves Piece, the valve block 402 outside valve block 401 and a pipe in a pipe, during air inlet and pinking, side air bleeding valve 4 is in closing State, under reflected shock wave and expanded gas flow impact, side air bleeding valve 4 is opened, oblique final vacuum；Main fuel spray nozzle 5 is every one section Distance is arranged on the tube wall of main shot room 201, and detonation fuel nozzle 6 has been installed in detonation chamber 203 on the tube wall of pipe 2031, is risen The delivery pipe of detonation material is passed through from the pipe of tubular bracket 2033；The quantity of main fuel spray nozzle 5 can be according to the length of main shot room 201 And the spray amount under single-nozzle normal pressure is determining, the volume and list of the quantity of the fuel nozzle 6 that detonates according to blasting chamber 203 The normal injection amount of individual nozzle is determining；Igniter 7 can be using conventional low-energy spark plug, it would however also be possible to employ high energy arc Igniter, 3 igniters 7 of the present embodiment implement igniting simultaneously, and 3 igniters 7 stretch into the mouse cage component of blasting chamber 203 In 2032 and in the same plane vertical with axis.

When pulse-knocking engine is driven, because main shot room 201 and blasting chamber 203 are in cold tubulose state, main fuel temperature Degree is low, and viscosity is big, and spray effect is poor, and the gasification of the fuel that detonates is also more difficult, along with the air in detonation tube 2 is normal pressure, The quick-fried energy and detonation pressure of explosive mixture are relatively low in blasting chamber 203, are not likely to produce stable Detonation Initiation Effect, therefore in the present embodiment, Engine is started by the way of compressed air with quick electric heating gasification detonation fuel；It is first turned on compressed air valve to be allowed to Into blasting chamber 203, main shot room 201 is then filled to, while the detonation fuel gasified with medium-high frequency sensing heater is sprayed into In mouse cage component 2032 in blasting chamber 203, it is allowed to also be diffused into main shot room 201, the igniting blasting blasting chamber 203 of igniter 7 And the explosive gas mixture in main shot room 201, multi-round is so circulated, treat that main shot room 201 is raised with the temperature of blasting chamber 203 After to a certain extent, compressed air supply is disconnected, simultaneously close off the power supply of medium-high frequency sensing heater；The tube wall of detonation tube 2 is preheated Main fuel by multiple main fuel spray nozzles 5 to main shot room 201 spray into atomized fuel, with main shot room 201 in air formed cloud Vaporific mixture, while the detonation fuel heated by the tube wall of detonation tube 2 is sprayed into by detonation fuel nozzle 6 into blasting chamber 203 Air in gasification detonation fuel, with blasting chamber 203 forms explosive gas mixture；Now igniter 7 is lighted a fire, and mixes blast Thing produces blast, and the high temperature and high pressure gas that produce of exploding become owner of shot room 201 along the cumulative of sieve plate 202 is laggard, and then ignite main shot room Cloud mixture in 201；The shock wave that blast is produced to nose cone direction is propagated, and is finally produced on the drive end bearing bracket of detonation tube 2 Thrust forward；It is catadioptric backward along main shot room 201 that shock wave produces back wave on end cap, valve block 401 in the pipe of offside air bleeding valve 4 Impulsive force is produced, side air bleeding valve 4 is opened, and sprays after explosion gas product is oblique, produces further thrust；With pinking Explosion gas product in pipe 2 is discharged, and overpressure is reduced rapidly, and when overpressure is outer less than pipe, multiple side valves 3 are beaten Open, manage outer fresh air and respectively enter main shot room 201 and blasting chamber 203 from the import of valve, remaining explosion product is fresh with part The exhaust outlet of air intake and exhaust integral valve 2034 together from blasting chamber 203 is discharged；Main fuel spray nozzle 5 and detonation fuel nozzle 6 again respectively to penetrating main fuel in main shot room 201 and blasting chamber 203 and detonation fuel, and igniter 7 is lighted a fire again, and pulse is quick-fried Shake engine carries out next round detonation cycle.

When engine enters normal operating conditions, with the increase of incoming air speed, charge flow rate increases therewith, main combustion Oily straying quatity also accordingly increases, and spark rate can be improved therewith, so as to improve detonation frequency, further improves motor power, Until reaching setting value；The straying quatity of main fuel need in good time be adjusted according to air mass flow, pinking process each time is done as far as possible To zero oxygen balance；Thrust can be adjusted by changing detonation frequency, and frequency of detonating can easily be controlled with spark rate, Frequency is higher, and thrust is bigger, and vice versa.

The above is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art Speech, under the premise without departing from the principles of the invention, can also make some modifications and adjustment, and these modifications and adaptations should be regarded as this The protection domain of invention.

Claims (10)

1. a kind of pulse-knocking engine of side exhaust, is at least sprayed by nose cone, detonation tube, side valve, side air bleeding valve, main fuel Mouth, detonation fuel nozzle and igniter composition；It is characterized in that：Detonation tube is the pipe of closed at both ends, and drive end bearing bracket is flat board end Lid, plays the effect of thrust wall, and rear end cap is hemispherical end cap；Detonation tube is divided into main shot room and blasting chamber, main shot room by one piece of sieve plate Front, blasting chamber is rear；Open pipe of the blasting chamber comprising a tube wall perforate, one mouse cage component of filling in pipe；Side is entered Air valve is arranged alternately vertically on the tube wall of detonation tube with side air bleeding valve；Main fuel spray nozzle is mounted in vertically main shot room tube wall On；On tube wall of the detonation fuel nozzle loaded on pipe in blasting chamber；When engine works, multiple main fuel spray nozzles are in main shot room Atomized fuel is sprayed into, while the fuel nozzle that detonates is to the indoor penetrating vaporising fuel of detonation, detonate indoor igniter fire, ignites Fuel gas mixture therein, hole of the high temperature and high pressure gas on sieve plate for producing of exploding collect it is laggard become owner of shot room, and then ignite Cloud mixture in main shot room；Act on the valve block of side valve and side air bleeding valve when the shock wave of generation is propagated forward first On, by side valve and side exhaust valve closure, finally produce impulse force in front blind end；When shock wave is produced on front Closed End Raw reflection along detonation tube turn back backward when, under reflected shock wave and expanded gas flow impact, side air bleeding valve is opened, explosion product gas Spray after body is oblique, produce augmented thrust；While the indoor explosion gas product of main shot room and detonation is discharged, in detonation tube Pressure is decreased, and when overpressure is reduced to a certain extent, side valve is opened, manage outer fresh air into main shot room and Blasting chamber, with detonation fuel nozzle again respectively to main shot room and the indoor penetrating fuel of detonation, igniter is again for main fuel spray nozzle Igniting, pulse-knocking engine enters next round detonation cycle.

2. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described main shot room Inside pipe wall is carved with vertically groove, and the quantity of groove is no less than 3, is evenly distributed.

3. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：On described sieve plate On one group of concentric circles, the centerline direction in each hole intersects with detonation tube axis for pore size distribution, the center line side in hole on same circle To meeting at a bit, the intersection point of the center line in cylindrical upper hole is remote compared with the intersection point in hole in inner circle with a distance from sieve plate.

4. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described blasting chamber is near At least one intake and exhaust integral valve is housed at end cap on tube wall.

5. the pulse-knocking engine that a kind of side according to claim 4 is vented, it is characterised in that：Described intake and exhaust one During body valve air inlet, air inlet is opened simultaneously with exhaust outlet, can exclude the explosion product gas of residual；During pinking, intake and exhaust Integral valve is in the closed position.

6. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：On described blasting chamber Equipped at least with a side valve and a side air bleeding valve.

7. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described mouse cage component Formed with holder combination by several coaxial cylindrical shape mouse cages, be rigid member.

8. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described side valve It is connected with an air intake duct on tube wall；Air intake duct can be supersonic inlet, it is also possible to be subsonic inlet.

9. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described side air bleeding valve Comprising two valve blocks, the valve block outside valve block and a pipe in a pipe, in pipe valve block can swing, so as to turn off or on Air bleeding valve.

10. the pulse-knocking engine that a kind of side according to claim 1 is vented, it is characterised in that：Described detonation tube Outside can install by-pass air duct additional, and by-pass air duct includes air intake duct, ring cavity and jet pipe.