Results 81 to 90 of about 34,664 (208)

Influences of oscillation on the physical stability and explosion characteristics of solid‒liquid mixed fuel

Defence Technology
The stratification phenomenon resulting from differences in the physical properties of solid‒liquid components seriously affect the final combustion and explosion characteristics of mixed fuel under the action of oscillation.
Chi Zhang, Ge Song, Hui Guo, Jiafan Ren, Chunhua Bai   +4 more
doaj   +1 more source

Combustion instability coupling with feed system acoustics [PDF]

High frequency combustion instability has recently been observed by Rocketdyne in a 40K thrust methane/LOX combustion chamber. The oscillations had frequencies as high as 14,000 Hz with pressure amplitudes in the LOX dome of 500 psi at a chamber ...
Breisacher, Kevin J., Priem, Richard J.
core   +1 more source

Dynamic Response Mechanism of Ethanol Atomization–Combustion Instability under a Contrary Equivalence Ratio Adjusting Trend

Aerospace
This study experimentally explored the effects of equivalence ratio settings on ethanol fuel combustion oscillations with a laboratory-scale combustor.
Chengfei Tao, Rongyue Sun, Yichen Wang, Yang Gao, Lin Meng, Liangbao Jiao, Shaohua Liang, Ling Chen   +7 more
doaj   +1 more source

Existence and stability of limit cycles for pressure oscillations incombustion chambers [PDF]

, 1983
In this paper, we discuss two problems. First, using a second order expansion in the pressure amplitude, some analytical results on the existence, stability and amplitude of limit cycles for pressure oscillations in combusticm chambers are presented.
Awad, E., Culick, F. E. C.
core  

An investigation of combustion instability in aircraft-engine reheat systems [PDF]

, 1968
The principal objective of this study was to examine experimentally the effects of upstream temperature, velocity, gutter blockage, tailpipe length, and main and pilot fuel flows, on the form of combustion instability encountered in aircraft reheat ...
Lefebvre, Arthur Henry, Squire, P. C., Verdin, H. W. P.   +2 more
core  

Experiments and modelling of rate-dependent transition delay in a stochastic subcritical bifurcation

, 2018
Complex systems exhibiting critical transitions when one of their governing parameters varies are ubiquitous in nature and in engineering applications. Despite a vast literature focusing on this topic, there are few studies dealing with the effect of the
Bonciolini, Giacomo, Boujo, Edouard, Ebi, Dominik, Noiray, Nicolas   +3 more
core   +2 more sources

Modeling pressure oscillations in Ramjets [PDF]

, 1980
Pressure oscillations in ramjet engines are approximated as one-dimensional motions and treated within linear acoustics. The exhaust nozzle is represented by the admittance function for a short choked nozzle.
Culick, F. E. C., Rogers, T.
core  

Imaging of fuel mixture fraction oscillations in a driven system using acetone PLIF [PDF]

, 2004
Measurements of fuel mixture fraction are made for a jet flame in an acoustic chamber. Acoustic forcing creates a spatially-uniform, temporally-varying pressure field which results in oscillatory behavior in the flame .
Culick, F. E. C., Kang, D. M., Pinedo, C., Ratner, A.   +3 more
core  

The vibroacoustical indexes of the internal combustion engine when the mass of the details of the crankshaft device varies [PDF]

Transport, 2002
The vibroacoustical indexes of the internal combustion engine retrogress when the mass of the details of the crankshaft device increases. The blatancy of sound pressure, oscillation speed, the whole engine increase very fractionally when mass increases ...
E. Juodzevičius, V. Valiūnas
doaj  

Effect of Injector Recess Depth on Flame Structure of Single Injector in Air Heater

Aerospace
To investigate the influence of injector recess depth on the combustion characteristics of air heaters, high-speed shadowgraph imaging technology combined with numerical simulation was employed.
Ke Wang, Chibing Shen, Bo Fan
doaj   +1 more source