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Title: Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air

Abstract

Two sets of experiments were performed to achieve a strong overdriven state in a weaker mixture by propagating an overdriven detonation wave via a deflagration-to-detonation transition (DDT) process. First, preliminary experiments with a propane/oxygen mixture were used to evaluate the attenuation of the overdriven detonation wave in the DDT process. Next, experiments were performed wherein a propane/oxygen mixture was separated from a propane/air mixture by a thin diaphragm to observe the transmission of an overdriven detonation wave. Based on the characteristic relations, a simple wave intersection model was used to calculate the state of the transmitted detonation wave. The results showed that a rarefaction effect must be included to ensure that there is no overestimate of the post-transmission wave properties when the incident detonation wave is overdriven. The strength of the incident overdriven detonation wave plays an important role in the wave transmission process. The experimental results showed that a transmitted overdriven detonation wave occurs instantaneously with a strong incident overdriven detonation wave. The near-CJ state of the incident wave leads to a transmitted shock wave, and then the transition to the overdriven detonation wave occurs downstream. The attenuation process for the overdriven detonation wave decaying to a near-CJ statemore » occurs in all tests. After the attenuation process, an unstable detonation wave was observed in most tests. This may be attributed to the increase in the cell width in the attenuation process that exceeds the detonability cell width limit. (author)« less

Authors:
;  [1];  [2];  [3]
  1. National Cheng Kung University, Institute of Aeronautics and Astronautics, Tainan (China)
  2. National Cheng Kung University, Aerospace Science and Technology Research Center, Tainan (China)
  3. University of Texas at Arlington, Mechanical and Aerospace Engineering Department, Aerodynamics Research Center, TX 76019 (United States)
Publication Date:
OSTI Identifier:
21081120
Resource Type:
Journal Article
Journal Name:
Combustion and Flame
Additional Journal Information:
Journal Volume: 154; Journal Issue: 3; Other Information: Elsevier Ltd. All rights reserved; Journal ID: ISSN 0010-2180
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PROPANE; DETONATION WAVES; OXYGEN; AIR; MIXTURES; WAVE PROPAGATION; SHOCK WAVES; ATTENUATION; EXPLOSIONS; Deflagration-to-detonation transition; Overdriven detonation

Citation Formats

Li, J, Lai, W H, Chung, K, and Lu, F K. Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air. United States: N. p., 2008. Web. doi:10.1016/J.COMBUSTFLAME.2008.04.010.
Li, J, Lai, W H, Chung, K, & Lu, F K. Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air. United States. https://doi.org/10.1016/J.COMBUSTFLAME.2008.04.010
Li, J, Lai, W H, Chung, K, and Lu, F K. 2008. "Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air". United States. https://doi.org/10.1016/J.COMBUSTFLAME.2008.04.010.
@article{osti_21081120,
title = {Experimental study on transmission of an overdriven detonation wave from propane/oxygen to propane/air},
author = {Li, J and Lai, W H and Chung, K and Lu, F K},
abstractNote = {Two sets of experiments were performed to achieve a strong overdriven state in a weaker mixture by propagating an overdriven detonation wave via a deflagration-to-detonation transition (DDT) process. First, preliminary experiments with a propane/oxygen mixture were used to evaluate the attenuation of the overdriven detonation wave in the DDT process. Next, experiments were performed wherein a propane/oxygen mixture was separated from a propane/air mixture by a thin diaphragm to observe the transmission of an overdriven detonation wave. Based on the characteristic relations, a simple wave intersection model was used to calculate the state of the transmitted detonation wave. The results showed that a rarefaction effect must be included to ensure that there is no overestimate of the post-transmission wave properties when the incident detonation wave is overdriven. The strength of the incident overdriven detonation wave plays an important role in the wave transmission process. The experimental results showed that a transmitted overdriven detonation wave occurs instantaneously with a strong incident overdriven detonation wave. The near-CJ state of the incident wave leads to a transmitted shock wave, and then the transition to the overdriven detonation wave occurs downstream. The attenuation process for the overdriven detonation wave decaying to a near-CJ state occurs in all tests. After the attenuation process, an unstable detonation wave was observed in most tests. This may be attributed to the increase in the cell width in the attenuation process that exceeds the detonability cell width limit. (author)},
doi = {10.1016/J.COMBUSTFLAME.2008.04.010},
url = {https://www.osti.gov/biblio/21081120}, journal = {Combustion and Flame},
issn = {0010-2180},
number = 3,
volume = 154,
place = {United States},
year = {Fri Aug 15 00:00:00 EDT 2008},
month = {Fri Aug 15 00:00:00 EDT 2008}
}