Results 251 to 260 of about 27,437 (306)

On the Hybrid Combustion Instability

Applied Mechanics and Materials, 2014
In the present paper, a combined method of large eddy simulations for non-premixed combustion in a turbulent flow coupled with proper orthogonal decomposition of instantaneous velocity, pressure and temperature fields is developed in order to identify the effect of coherent structure and to obtain a reduced order model for control model.
Sterian Danaila, Constantin Leventiu
openaire   +1 more source

Instability of Combustion

AIAA Journal, 1974
THE following equations governing the phenomenon of intrinsic instability of combustion, leading to low frequency oscillations in a rocket motor using a single liquid propellant, were derived and investigated by L. Crocco.
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Wave instability in combustion

Computer Methods in Applied Mechanics and Engineering, 1991
Abstract This paper presents formulations and calculations involved in combustion instability analysis using finite element methods. Emphasized in the present study is the effect of chemical reactions upon unstable waves of all variables. It is also shown how nonlinear, nonisentropic, and flowfields influence the stability of combustion waves.
T.J. Chung, W.S. Yoon
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Incomplete combustion - A possible cause of combustion instability

AIAA Journal, 1983
The performance of and the combustion in solid-propellant rocket motors may be affected by characteristic length \((L^*)\). For small characteristic lengths, the chamber pressure and characteristic velocity may be lower than in similar motors with larger \(L^*\). Oscillatory combustion may take place if the \(L^*\) is small enough. In the past, \(L^*\)
openaire   +1 more source

Asymptotic approach to combustion instability

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2005
This paper presents an asymptotic approach to combustion instability in premixed flames under the assumptions of large activation energy and small Mach number. The entire flow consists of four distinct yet fully interactive sub-regions, which accommodate the chemical reaction, heat transport, hydrodynamics and acoustics, respectively.
openaire   +3 more sources

Combustion wave instability in the filtration combustion of gases

Combustion, Explosion and Shock Waves, 1994
Theoretical and experimental approaches to the problem of combustion wave stability in gas filtration combustion are described. An approximate criterion of instability for an initially plane combustion wave front is suggested within the framework of a hydrodynamic model.
S. S. Minaev, S. I. Potytnyakov, V. S. Babkin   +2 more
openaire   +1 more source

Propellant Combustion Instability as Measured by Combustion Recoil

AIAA Journal, 1972
11 Moore, C. B., "Vibration-Rotation Energy Transfer," Journal of Chemical Physics, Vol. 43, No. 9, Nov. 1965, p. 2979. 12 Shin, H. K., "Deexcitation of Molecular Vibration on Collisions: Vibration-tp-Rotation Energy "transfer in Hydrogen Halides," Journal of Physical Chemistry, Vol. 75, No. 8, Aug. 1971, p. 1079. 12 Shin, H.
C.M. MIHLFEITH, A.D. BAER, N.W. RYAN
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Minimax controller design for combustion instabilities

Proceedings of the 2003 American Control Conference, 2003., 2004
A robust feedback controller for combustion thermoacoustics instabilities is presented in this paper. To address the issue of the system's parameter uncertainties, the minimax principles based controller is used. The minimax corresponds to finding the best controller for the worst parameter deviation.
Nidal Al-Masoud, Tarunraj Singh
openaire   +1 more source

Instability of combustion and detonation of gases

Uspekhi Fizicheskih Nauk, 1965
CONTENTS 1. Normal combustion of gases 780 2. The instability of normal combustion 781 3. Detonation 785 4. The instability of planar gas detonation with respect to the combustion front 789 5. One-dimensional instability of detonation 790 6. Pulsating detonation 792 7.
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An analytically tractable model for combustion instability

Proceedings of the 44th IEEE Conference on Decision and Control, 2006
A system of two coupled Van der Pol equations is considered as a model for combustion instability. This system is analyzed using the Krylov-Bogoliubov method. The results of the analysis are compared with simulation results and with data obtained from a combustion system.
Fethi Bouziani, Ioan Doré Landau, Alina Voda Besançon, Robert R. Bitmead   +3 more
openaire   +1 more source