scholarly journals Experimental Studies on Detonation Initiation of Liquid-Fuel-Air Mixture in a Pulse Detonation Engine with Initiator

2004 ◽  
Vol 52 (611) ◽  
pp. 549-555
Author(s):  
Tomoaki Yatsufusa ◽  
Masahiro Ohira ◽  
Shin’ichi Yamamoto ◽  
Kazuhiro Nishimura ◽  
Koichi Yoshinaga ◽  
...  
Keyword(s):  
Liquid Fuel ◽  
Experimental Studies ◽  
Detonation Initiation ◽  
Pulse Detonation Engine ◽  
Pulse Detonation ◽  
Detonation Engine

scholarly journals Review on Recent Advances in Pulse Detonation Engines

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
K. M. Pandey ◽  
Pinku Debnath
Keyword(s):  
Detonation Wave ◽  
Combustion Process ◽  
Experimental Studies ◽  
Pulse Detonation Engine ◽  
Wave Flow ◽  
Pulse Detonation Engines ◽  
Pulse Detonation ◽  
Propulsion Performance ◽  
Detonation Tube ◽  
Detonation Engine

Pulse detonation engines (PDEs) are new exciting propulsion technologies for future propulsion applications. The operating cycles of PDE consist of fuel-air mixture, combustion, blowdown, and purging. The combustion process in pulse detonation engine is the most important phenomenon as it produces reliable and repeatable detonation waves. The detonation wave initiation in detonation tube in practical system is a combination of multistage combustion phenomena. Detonation combustion causes rapid burning of fuel-air mixture, which is a thousand times faster than deflagration mode of combustion process. PDE utilizes repetitive detonation wave to produce propulsion thrust. In the present paper, detailed review of various experimental studies and computational analysis addressing the detonation mode of combustion in pulse detonation engines are discussed. The effect of different parameters on the improvement of propulsion performance of pulse detonation engine has been presented in detail in this research paper. It is observed that the design of detonation wave flow path in detonation tube, ejectors at exit section of detonation tube, and operating parameters such as Mach numbers are mainly responsible for improving the propulsion performance of PDE. In the present review work, further scope of research in this area has also been suggested.

scholarly journals Evaluation of critical blockage ratio and pulse length in a pulse detonation engine using CFD and MATLAB

2018 ◽  
Vol 172 ◽  
pp. 02006 ◽  
Author(s):  
S. Srikrishnan ◽  
P. K. Dash ◽  
V. Jayakumar
Keyword(s):  
Pulse Length ◽  
Pressure Rise ◽  
Detonation Initiation ◽  
Tube Length ◽  
Pulse Detonation Engine ◽  
Detonation Pressure ◽  
Time Duration ◽  
Pulse Detonation ◽  
Wide Range ◽  
Detonation Engine

A Pulse Detonation Engine (PDE) is a new invented propulsion device that takes advantage of the pressure rise inherent to the efficient burning of fuel-air mixtures via detonations. Detonation initiation is a critical process that occurs in the cycle of a PDE. A practical method of detonation initiation is Deflagration-to-Detonation Transition (DDT), which describes the acceleration of a subsonic deflagration created using low initiation energies to a supersonic detonation. The DDT process is not well understood due to a wide range of time and length scales involving complex chemistry, turbulence and unsteady pressure waves. This paper discuss about the effects of blocking ratio in the augmentation of detonation pressure and velocity inside a cylindrical tube of diameter 0.0254m and a length of 1 m. The blockages are rectangular in shape placed at 2/3rd distances of the length of the tube and the heights of the blockages are varied in terms of the diameter of the tube as 1/4th, 1/3rd, ½, 2/3rd and 3/4th the diameter of the tube. The setup is then analyzed in MATLAB using the physics of Friedlander’s equation, which formulate the decay time duration of pressure across the tube length, with and without the blockage. Further, a 2D CFD analysis through ANSYS Workbench is conducted which gave the effective blocking ratio in a rectangular type of blockage placed at the 2/3rd position of the length of the tube and the results are compared. For variable pressures ranging from 1 MPa to 100 MPa input, the effective pulse length is around 0.25 seconds after which the decay of pressure and temperature attain the critical limit. Also it is found that the maximum feasible velocity occurs for an inlet pressure of 10 MPa and 2/3rd height of the blockage where the corresponding outlet velocity is 4692m/s and outlet total pressure being 10.542 MPa.

Ignition method effect on detonation initiation characteristics in a pulse detonation engine

2016 ◽  
Vol 93 ◽  
pp. 1-7 ◽  
Author(s):  
Zhiwu Wang ◽  
Yang Zhang ◽  
Jingjing Huang ◽  
Zijian Liang ◽  
Longxi Zheng ◽  
...  
Keyword(s):  
Detonation Initiation ◽  
Pulse Detonation Engine ◽  
Pulse Detonation ◽  
Method Effect ◽  
Detonation Engine

scholarly journals Study on Influence of Diameter on Detonation Acoustic Characteristics of Pulse Detonation Engine

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Gui-yang Xu ◽  
Chun-guang Wang ◽  
Yan-fang Zhu ◽  
Hong-yan Li ◽  
Lun-kun Gong ◽  
...  
Keyword(s):  
Acoustic Characteristic ◽  
Pulse Detonation Engine ◽  
Acoustic Characteristics ◽  
Experiment System ◽  
Pulse Detonation ◽  
Impact Noise ◽  
Maximum Duration ◽  
Detonation Engine ◽  
Set Up ◽  
Different Diameters

AbstractThe experiment system of pulse detonation engine is set up to investigate on influence of diameter on detonation acoustic characteristic. The research of detonation acoustic characteristic of pulse detonation engine for four different diameters in different angles is carried out. Results from the test show that as the PDE diameter increasing, there are increases in amplitudes of impact noise in all angles, and the growth rate of amplitude of impact noise in the 90° direction is generally greater than that in the 0° direction. The smaller PDE diameter is, the distance of most obvious directivity at 0° turning to most obvious directivity at 30° is shorter. When the distance is shorter, such as 200 mm, the duration of detonation acoustic is increasing with the increase of PDE diameter, however, when the distance is longer, such as 3000 mm, it is just the opposite. The maximum duration of detonation acoustic is appeared in 3000 mm under 30 mm PDE diameter which reaches to 1.44 ms.

An analytical model for the impulse of a single-cycle pulse detonation engine

2001 ◽  
Author(s):  
E. Wintenberger ◽  
J. Austin ◽  
M. Cooper ◽  
S. Jackson ◽  
J. Shepherd
Keyword(s):  
Analytical Model ◽  
Pulse Detonation Engine ◽  
Single Cycle ◽  
Pulse Detonation ◽  
Detonation Engine ◽  
Cycle Pulse
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