2 edition of Theoretical investigation of the structure of gaseous detonation waves. found in the catalog.
Theoretical investigation of the structure of gaseous detonation waves.
Brian James Scroggie
Written in English
|Contributions||Toronto, Ont. University. Theses (M.Sc.)|
|LC Classifications||LE3 T525 MSC 1967 S37|
|The Physical Object|
|Number of Pages||52|
Classical idealized theories of detonation waves are presented first. These permit detonation speed, gas properties ahead and behind the detonation wave, and the distribution of fluid properties within the detonation wave itself to be determined. Subsequent chapters describe in detail the real unstable structure of a detonation wave. The Limits of Stationary Propagation of Gaseous Detonation.- Propagation of Gas Explosion in Channels with Uneven Walls and in Porous Media.- Physical Model of Dynamic Structure of the Surface of Detonation Wave.- Theoretical Description of Direct Initiation of Detonation for One-Step Chemistry.- Group Methods for the Study of Detonation Wave.
Investigation of the structure of detonation waves in a non-premixed hydrogen–air rotating detonation engine using mid-infrared imaging Proceedings of the Combustion Institute, Vol. 37, No. 3 Experimental research on rotating detonation with liquid hypergolic propellants. Gas phase detonation has frequently been studied, because its three-dimensional shock wave structure can be photographed, the pressure it produces is .
The 2D structure of a continuous detonation wave is presented and compared with the 3D structure. The influence of the radius of the curvature of the duct and the effect of a slot injection on the. Theoretical detonation characteristics were com- in the burned gases; no energy, com- ponent, have been concerned primarily with the structure of the wave. The details of both the classical and the current the- oretical work are presented in modem books such as Hirschfelder, Curtiss, and Bird (10) and Courant and Fried-.
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Detonation waves or borehole pressures at different positions in the blasthole are generally different from one another, for example in their wave lengths. As shown in Fig. one primer is placed at the bottom of a the detonation front arrives at location C, the boundary between the explosive charge and the stemming, the expanded wall of the blasthole, the crushed.
A detonation wave propagates at almost the CJ speed with only a small velocity decrease, and the region of evaporation moves at a speed same as that of the detonation (Fig. 8d). The type-(iii) and type-(iv) waves propagate at local velocities u and u − c, respectively.
Figure 10 schematically depicts the structure of gaseous detonation with Cited by: 4. INVESTIGATION OF THE STRUCTURE OF DETONATION WAVES IN GASES B.
VOITSEKHOVSKII, V. MITROFANOV AND M. TOPCttlAN The Institute of Hydrodynamics of the Siberian Branch of the Academy of Sciences, Novosibirsk, USSR The application of advanced compensating methods of photography has made it possible to obtain an undistorted picture of the Cited by: Rotating detonation engines are a novel device for generating thrust from combustion, in a highly efficient, yet mechanically simple form.
This chapter presents a detailed literature review of rotating detonation engines. Particular focus is placed on the theoretical aspects and the fundamental operating principles of these engines. The review covers both experimental and computational studies Author: Ian J.
Shaw, Jordan A.C. Kildare, Michael J. Evans, Alfonso Chinnici, Ciaran A.M. Sparks, Shekh N.H. The basic experimental facts concerning of complicated mul ti dimensional non-stationary structure both of the detonation wave and its front surface, generation of the cell structure, the effect of transverse waves, obstacles, channel geometry etc.
on the transition from dynamic regime to stationary structure are represented in the fist three. The thermicity (σ) and temperature (T) profiles of the ZND detonation structure in the CH O 2 mixture at p 0 = 15 kPa are given in Fig. profiles are calculated based on the CHEMKIN package and the Konnov profiles were verified in the previous literature using a detonation property calculation.Thermicity refers to the effective energy that is transferred to.
Introduction. Gaseous hydrocarbon detonation method was employed in the preparation of ultra-fine carbon black in the middle of the 20th century, due to its high yield of products and low consumption of the development of gaseous detonation method, it has become a novel method for nanomaterials prepared.As an easy to operate method, unsaturated hydrocarbons, such as.
In the present work the propagation of gaseous detonations in a channel with porous walls is investigated experimentally and numerically. The main goal of the study is to determine the role of diffusive turbulent mixing and transverse waves in controlling the detonation.
Select SPECTROPHOTOMETRIC ANALYSIS OF DETONATION WAVE STRUCTURE. Book chapter Full VIBRATION AND COMBUSTION INVESTIGATION OF THE LR99 ENGINE. Mario J. Luperi and Sanford J. Tick under which detonation may be initiated or sustained, such as high explosives, solid propellants, liquid sprays, and gases.
Experimental and theoretical studies. In studying the detonation phenomenon in gas mixtures, much attention is traditionally paid to investigation of the multifront (cellular) structure of a self-sustained unsteady detonation wave (DW. The papers on detonation, given in Part 1, cover the entire range of physical conditions under which detonation may be initiated or sustained - e.g., high explosives, solid propellants, liquid sprays, and gases.
Experimental and theoretical studies are included. Two- and three-dimensional simulation results are presented that investigate at great detail the temporal evolution of Mach reflection sub-structure patterns intrinsic to gaseous detonation waves.
Oblique detonation waves (ODWs) have attracted increasing attention in recent years due to their potential application to air-breathing hypersonic pro.
High-Resolution Numerical Simulation and Analysis of Mach Reflection Structures in Detonation Waves in Low-Pressure H2–O2–Ar Mixtures: A Summary of Results Obtained with the Adaptive Mesh Refinement Framework AMROC. Journal of Combustion, Vol. Issue., p. Irregular detonations are supersonic combustion waves in which the inherent multi-dimensional structure is highly variable.
In such waves, it is questionable whether auto-ignition induced by shock compression is the only combustion mechanism present.
Through the use of high-speed schlieren and self-emitted light photography, the velocity of the different components of detonation waves. Part 1. Detonations in Solids, Liquids, and Gases Stability of Detonation Waves at Low Pressures Spectrophotometric Analysis of Detonation Wave Structure Parametric Studies of Strong Gaseous Detonations Estimating Caloric State Behavior in Condensed-Phase Detonations Theoretical Treatment of the Detonation Behavior of Composite Propellants.
An ev olution of gaseous detonation wave structure in the cloud of theoretical investigations of The method of gas detonation wave attenuation and suppression by chemically inert particles. Numerical investigation on propagation behavior of gaseous detonation in water spray Proceedings of the Combustion Institute, Vol.
37, No. 3 Experimental characterization of. Detonation velocity is an important property to consider when rating an explosive. It may be ex-pressed as a confined or unconfined value and is normally given in feet per second (fps).
The confined detonation velocity measures the speed at which the detonation wave travels through a column of explo-sive within a borehole or other confined space.
The existence of a secondary discontinuity at the rear of a detonation front shown in experiments by Peraldi and Veyssiere () in stoichiometric hydrogen-oxygen mixtures with suspended $\mu$ m starch particles has not been explained satisfactorily.
Recently Veyssiere et al. () analyzed these results using a one-dimensional (1-D) numerical model, and concluded that the heat release. Appendix A: Grid-resolution study. A grid-resolution study is performed to determine the required resolution, which is determined by the ability to resolve the interaction between the Mach stem, incident shock and transverse waves .The interaction is critical in sustaining the detonation as it creates a zone of high pressure and temperature that causes the gas to expand as chemical energy is.Gaseous detonation waves were first observed and reported in by Berthelot, Vieille, Mallard, and Le Chatelier.
The definition of detonation waves is combustion waves accompanied by shock waves. Usually such phenomena are observed in a tube, through which a combustion wave propagates in a premixed combustible gas.[Show full abstract] reactive gas (CO2) is added to detonating gas mixtures, a fine structure of the detonation waves is formed.
Visualizations of spinning detonations show that perturbations.