Abstract
Self-sustained oblique detonation waves around projectiles were experimentally studied as part of a fundamental investigation of the application of an oblique detonation wave engine and a high-efficiency detonation wave combustor as a power generator. The mean-curvature coefficient was constant and did not depend on the type of fuel mixture (H2/O2/Ar or C2H2/O2/Ar), initial mixture pressure, projectile diameter, projectile velocity, or diluent mole fraction. A more accurate mean-curvature coefficient for stabilized oblique detonation around symmetric spherical bodies in highly krypton-diluted acetylene/oxygen mixtures that have extremely low C-J velocities was observed. A lower-velocity projectile could stabilize a self-sustained oblique detonation wave more effectively than a higher-velocity one, and the attenuation rate depended only on the non-dimensional mean-curvature radius. A mean-curvature coefficient of 7.8 was the first expression of criticality and was the most important value for generating self-sustained oblique detonation stabilized around multidimensional bodies. In the high-projectile-velocity region, the experimental critical condition was inconsistent with Lee's detonation initiation theory. A semi-empirical criticality equation for the stabilization was proposed, which was the secondary expression of the criticality and identical with present and past experimental results. This is an abstract of a paper presented at the 29th International Symposium on Combustion (Sapporo, Japan 7/21/2002).
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the Combustion Institute |
| Editors | J.H. Chen, M.D. Colket |
| Pages | 2817-2824 |
| Number of pages | 8 |
| Volume | 29 II |
| Publication status | Published - 2002 |
| Event | Twenty-Ninth International Symposium on Combustion - Sapporo, Japan Duration: 2002 Jul 21 → 2002 Jul 25 |
Other
| Other | Twenty-Ninth International Symposium on Combustion |
|---|---|
| Country | Japan |
| City | Sapporo |
| Period | 02/7/21 → 02/7/25 |
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ASJC Scopus subject areas
- Automotive Engineering
Cite this
Criticality for stabilized oblique detonation waves around spherical bodies in acetylene/oxygen/krypton mixtures. / Kasahara, Jiro; Arai, Takakage; Chiba, Shingo; Takazawa, Kouki; Tanahashi, Yu; Matsuo, Akiko.
Proceedings of the Combustion Institute. ed. / J.H. Chen; M.D. Colket. Vol. 29 II 2002. p. 2817-2824.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Criticality for stabilized oblique detonation waves around spherical bodies in acetylene/oxygen/krypton mixtures
AU - Kasahara, Jiro
AU - Arai, Takakage
AU - Chiba, Shingo
AU - Takazawa, Kouki
AU - Tanahashi, Yu
AU - Matsuo, Akiko
PY - 2002
Y1 - 2002
N2 - Self-sustained oblique detonation waves around projectiles were experimentally studied as part of a fundamental investigation of the application of an oblique detonation wave engine and a high-efficiency detonation wave combustor as a power generator. The mean-curvature coefficient was constant and did not depend on the type of fuel mixture (H2/O2/Ar or C2H2/O2/Ar), initial mixture pressure, projectile diameter, projectile velocity, or diluent mole fraction. A more accurate mean-curvature coefficient for stabilized oblique detonation around symmetric spherical bodies in highly krypton-diluted acetylene/oxygen mixtures that have extremely low C-J velocities was observed. A lower-velocity projectile could stabilize a self-sustained oblique detonation wave more effectively than a higher-velocity one, and the attenuation rate depended only on the non-dimensional mean-curvature radius. A mean-curvature coefficient of 7.8 was the first expression of criticality and was the most important value for generating self-sustained oblique detonation stabilized around multidimensional bodies. In the high-projectile-velocity region, the experimental critical condition was inconsistent with Lee's detonation initiation theory. A semi-empirical criticality equation for the stabilization was proposed, which was the secondary expression of the criticality and identical with present and past experimental results. This is an abstract of a paper presented at the 29th International Symposium on Combustion (Sapporo, Japan 7/21/2002).
AB - Self-sustained oblique detonation waves around projectiles were experimentally studied as part of a fundamental investigation of the application of an oblique detonation wave engine and a high-efficiency detonation wave combustor as a power generator. The mean-curvature coefficient was constant and did not depend on the type of fuel mixture (H2/O2/Ar or C2H2/O2/Ar), initial mixture pressure, projectile diameter, projectile velocity, or diluent mole fraction. A more accurate mean-curvature coefficient for stabilized oblique detonation around symmetric spherical bodies in highly krypton-diluted acetylene/oxygen mixtures that have extremely low C-J velocities was observed. A lower-velocity projectile could stabilize a self-sustained oblique detonation wave more effectively than a higher-velocity one, and the attenuation rate depended only on the non-dimensional mean-curvature radius. A mean-curvature coefficient of 7.8 was the first expression of criticality and was the most important value for generating self-sustained oblique detonation stabilized around multidimensional bodies. In the high-projectile-velocity region, the experimental critical condition was inconsistent with Lee's detonation initiation theory. A semi-empirical criticality equation for the stabilization was proposed, which was the secondary expression of the criticality and identical with present and past experimental results. This is an abstract of a paper presented at the 29th International Symposium on Combustion (Sapporo, Japan 7/21/2002).
UR - http://www.scopus.com/inward/record.url?scp=0038156293&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038156293&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0038156293
VL - 29 II
SP - 2817
EP - 2824
BT - Proceedings of the Combustion Institute
A2 - Chen, J.H.
A2 - Colket, M.D.
ER -