Unlock instant, AI-driven research and patent intelligence for your innovation.

Pulse jet engines

A jet engine, engine technology, applied in the direction of engine components, engine manufacturing, machines/engines, etc., to achieve the effect of increasing thrust and improving aerodynamic efficiency

Inactive Publication Date: 2007-05-09
威廉·安东尼·德纳
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However these are not true pulse jet engines as the fuel / air mixture is introduced for each pulse and the fuel / air mixture is ignited or detonated individually by a very carefully designed and controlled detonation detonator

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Pulse jet engines
  • Pulse jet engines
  • Pulse jet engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Referring first to Figure 1 of the accompanying drawings, a first embodiment of an ultrasonic pulse jet engine comprises a quarter wave gas resonator 1 in the form of a tube 2 having a reduced annular cross-section to widen the pressure wave from it The nozzle 3 at one end of the node converges to a closed pressure antinode 4 at its other end. The cross-section of the tube 2 may be triangular, square, rectangular or any other suitable shape which may vary along its length. The convergence of the reduced cross-section of the resonator tube 2 can be any of a wide range of profiles. However, whatever the specific profile of the resonator tube 2, it provides a relatively small working volume which tends to limit the power achievable by the engine. A number of individual resonator tubes 2 may be used, but a more suitable configuration is a slot cross-section resonator such as that shown generally at 2 in FIG. 2 .

[0052] In this second embodiment of the ultrasonic pulse j...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A pulse jet engine comprising a quarter wave gas resonator (1) which is arranged to cycle at an ultrasonic frequency, wherein the resonator (1) is closed, or substantially closed, to gas flow at the pressure antinode (4) thereof. The shape and dimensions of the quarter wave gas resonator (1) at least partially determine the ultrasonic frequency at which the resonator (1) cycles.

Description

technical field [0001] This invention relates to pulse jet engines and other aspects thereof. Background technique [0002] Pulse jet engines of various designs have been known for over a century. Typically, they consist of a quarter-wave gas resonator in which fuel and air are introduced at the pressure antinodes of the resonator during its low-pressure phase. Some pulse jet engines include a half-wave resonator and have power output at a pressure node or nodes. [0003] Ignition can be achieved by mixing the remaining hot exhaust gases with the incoming fuel and air so that no other ignition system is required once the engine is running. [0004] This engine is remarkably efficient due to this simplification, but the noise level it generates is completely unpredictable and cannot be easily eliminated. Primarily for this reason, pulse jet engines are rarely used. [0005] Liquid-fueled pulse jet engines are difficult to start, but once running, are extremely efficient. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02K7/04
CPCY02T50/671F05D2250/70F02K7/04F02K7/02F05C2203/0895F05D2300/2118Y02T50/60
Inventor 威廉·安东尼·德纳
Owner 威廉·安东尼·德纳
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com