GB761726A - Improvements in pulsatory flow jet units - Google Patents
Improvements in pulsatory flow jet unitsInfo
- Publication number
- GB761726A GB761726A GB27684/54A GB2768454A GB761726A GB 761726 A GB761726 A GB 761726A GB 27684/54 A GB27684/54 A GB 27684/54A GB 2768454 A GB2768454 A GB 2768454A GB 761726 A GB761726 A GB 761726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- divergent
- pulse jet
- convergent
- distance
- cone angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K7/00—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof
- F02K7/02—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet
- F02K7/06—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet with combustion chambers having valves
- F02K7/067—Plants in which the working fluid is used in a jet only, i.e. the plants not having a turbine or other engine driving a compressor or a ducted fan; Control thereof the jet being intermittent, i.e. pulse-jet with combustion chambers having valves having aerodynamic valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
761,726. Jet - propulsion plant. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. Sept. 24, 1954 [Sept. 29, 1953], No. 27684/54. Addition to 711,281. Class 110 (3). A pulse jet unit having an elongated combustion chamber with an exhaust nozzle discharging into a convergent-divergent thrust augmenting tube open at both ends as described and claimed in Specification 711,281, has the inlet opening of the thrust augmenting tube spaced from the end orifice of the nozzle by a distance which is between about a half and twice the diameter of the end orifice. The pulse jet comprises a combustion chamber 1 which discharges through a tubular member 3 and has an inlet aerodynamic valve 2. The member 3 discharges through a convergentdivergent tubular member 7, 4 the place of the inlet of which is spaced from the plane of the discharge nozzle by a distance i at least approximately equal to half the diameter of the discharge nozzle d. The distance i may be increased up to a maximum value of 2d. The neck between the portions 7, 4 of the convergent-divergent member should have an area s up to about 1.5 times the area of the discharge nozzle. The divergent portion 4 may have an included angle of up to 5 degrees when the pulse jet frequency is less than 100 cycles per second. A cone angle of 10 degrees may be used for frequencies between 50 and 150. For higher frequencies larger angles may be used. The convergent-divergent member 7, 4 may be supported from the pulse jet by arms 10. The divergent section 4 may comprise a first part having a cone angle coupling with the conditions referred to above, followed by a part which has a larger cone angle. A number of consecutive conical sections may be provided. In another modification, the divergence of the section 4 increases continuously. A duct formed by a casing around the pulse jet may be used to supply air to the intake of the convergent-divergent member. The length of the ejector l is preferably less than the distance travelled by sound in one second in the hot gases divided by six times the frequency of the pulsations. Specification 653,629 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR761726X | 1953-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB761726A true GB761726A (en) | 1956-11-21 |
Family
ID=9174104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27684/54A Expired GB761726A (en) | 1953-09-29 | 1954-09-24 | Improvements in pulsatory flow jet units |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB761726A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1199057B (en) * | 1961-07-11 | 1965-08-19 | Berliner Maschb A G Vormals L | Intermittent water recoil engine |
| US3206926A (en) * | 1962-04-19 | 1965-09-21 | Hiller Aircraft Company Inc | Development and augmentation of intermittent thrust producing fluid flows |
| CN109715913A (en) * | 2016-08-08 | 2019-05-03 | 杰托普特拉股份有限公司 | Pipe fluid remover system is discharged in internal combustion engine |
| CN110478994A (en) * | 2013-03-04 | 2019-11-22 | 唐纳森公司 | Air filter system and its application method |
| RU2793868C1 (en) * | 2022-08-15 | 2023-04-07 | Игорь Викторович Ниппард | Supercharged pulse jet |
-
1954
- 1954-09-24 GB GB27684/54A patent/GB761726A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1199057B (en) * | 1961-07-11 | 1965-08-19 | Berliner Maschb A G Vormals L | Intermittent water recoil engine |
| US3206926A (en) * | 1962-04-19 | 1965-09-21 | Hiller Aircraft Company Inc | Development and augmentation of intermittent thrust producing fluid flows |
| CN110478994A (en) * | 2013-03-04 | 2019-11-22 | 唐纳森公司 | Air filter system and its application method |
| CN110478994B (en) * | 2013-03-04 | 2021-09-28 | 唐纳森公司 | Air filter system and method of using same |
| CN113769498A (en) * | 2013-03-04 | 2021-12-10 | 唐纳森公司 | Air filter system and method of using same |
| CN113769498B (en) * | 2013-03-04 | 2023-03-10 | 唐纳森公司 | Air filter system and method of using same |
| US11931681B2 (en) | 2013-03-04 | 2024-03-19 | Donaldson Company, Inc. | Air filter systems and methods of using the same |
| CN109715913A (en) * | 2016-08-08 | 2019-05-03 | 杰托普特拉股份有限公司 | Pipe fluid remover system is discharged in internal combustion engine |
| RU2808674C1 (en) * | 2022-06-27 | 2023-12-01 | Игорь Викторович Ниппард | Straight-through pulsating jet engine with gas-dynamic diodes |
| RU2793868C1 (en) * | 2022-08-15 | 2023-04-07 | Игорь Викторович Ниппард | Supercharged pulse jet |
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