Relation between cell size and detonation parameters in overdriven gaseous detonations

Journal Article · Sun Feb 01 00:00:00 EST 1987 · Combust. Flame; (United States)

OSTI ID:7100082

Wei, H Z; Bin, X

An experimental study of the cellular structure of overdriven detonation waves which are caused by the transition process from deflagration to detonation has been conducted. The results, relating cell size and detonation parameters, are presented in this paper. For mixtures of 2H/sub 2/ + O/sub 2/, 2H/sub 2/ + 5air, and 2H/sub 2/ + O/sub 2/ + 3Ar it has been found that the relation between the number of transverse cells in a square tube, N, and the detonation pressure P is approximately linear, and the slopes of the (N, P/P/sub CJA/ lines are almost the same for different mixtures and initial pressures. A simple formula, therefore, was obtained to estimate overdriven detonation pressure from cell size. The dependence of cell size on detonation velocity was also observed experimentally and analysis of the results has shown that L approx. = constant. Therefore, the conclusion for CJ gaseous detonation is that this result can be used to predict overdriven cases.

• Research Organization: Dept. of Modern Mechanics, Univ. of Science and Technology, Hefei
• OSTI ID: 7100082
• Journal Information: Combust. Flame; (United States), Vol. 67:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ARGON
DETONATIONS
HYDROGEN
OXYGEN
CALCULATION METHODS
DATA ANALYSIS
EXPERIMENTAL DATA
MIXTURES
PARAMETRIC ANALYSIS
PHASE VELOCITY
PRESSURE DEPENDENCE
RESEARCH PROGRAMS
SHOCK WAVES
TUBES
DATA
DISPERSIONS
ELEMENTS
FLUIDS
GASES
INFORMATION
NONMETALS
NUMERICAL DATA
RARE GASES
VELOCITY
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry