Results 71 to 80 of about 34,664 (208)

Suppression Mechanisms of Stratified Jet-in-Crossflow on Thermoacoustic Instability and NOx Emissions in Premixed Combustors

open access: yesApplied Sciences
The premixed combustion of a gas turbine is prone to thermoacoustic oscillation, which affects the safety of combustion systems. This study experimentally investigated the suppression mechanism of a stratified jet-in-crossflow on the thermoacoustic ...
Rongyue Sun, Chengfei Tao
doaj   +1 more source

Numerical Analysis of Pulse Decay Characteristics in Solid Rocket Motors for Different Finocyl Grain Configurations

open access: yesAerospace
Combustion instability is an abnormal working state that often occurs in advanced solid rocket motors (SRMs), which can arouse pressure oscillations, increase the risk of mission failure, and even cause structural damage.
Fengnan Guo   +4 more
doaj   +1 more source

Combustion Oscillation in Oil Mist Firing

open access: yesTransactions of the Japan Society of Mechanical Engineers, 1962
This paper deals with the unstable combustion of liquid fuel in a combustor. Owing to the increase of air-fuel ratio in the range larger than stoichiometric one, combustion becomes unstable, the noise increases and also the pressure and the temperature in the combustor oscillate at a frequency of 20 to 50 cps. Moreover, blow-off phenomenon results from
Takashi SATO   +2 more
openaire   +3 more sources

Spray Combustion Dynamics Under Thermoacoustic Oscillations

open access: yes, 2011
{"references": ["J. C. Solt, J. Tuzson, Proceedings of 1993 ASME IGTI Conference\nPaper 93-GT-270, 1993.", "T. Lieuwen, B. T. Zinn, AIAA 36th Aerospace Sciences Meeting &\nExhibit Paper 98-0641, 1998.", "A. Y. Tong, W. A. Sirignano, Journal of Propulsion and Power 5(3)\n(1989) 257-261.", "W. A.
Chishty, Wajid A.   +2 more
openaire   +1 more source

Coupled vortex shedding and acoustic resonances in a duct [PDF]

open access: yes, 1985
Undesirable sound generation in the combustion chambers of solid propellant rocket motors previously has been attributed to vortex shedding from obstructions that are uncovered as the propellant burns back. An experimental investigation of the phenomenon
Aaron, K. M., Culick, F. E. C.
core  

Numerical investigation on the engraving process of a pyrotechnic actuator with an improved two-phase flow model of interior ballistic

open access: yesDefence Technology
By combining with an improved model on engraving process, a two-phase flow interior ballistic model has been proposed to accurately predict the flow and energy conversion behaviors of pyrotechnic actuators.
Yue Li   +3 more
doaj   +1 more source

Experiment investigation of the effects of hydrogen content on the combustion instability of methane/hydrogen lean premixed swirl flames under different acoustic frequency ranges

open access: yesAIP Advances, 2019
Experimental study on combustion instability of lean premixed swirl flame was conducted for methane-hydrogen mixtures, and the influence mechanism of hydrogen content (0%, 10%, 20%, and 40%) on the combustion instability under different acoustic ...
Mingxiao Wang, Yingjie Zhong, Kai Deng
doaj   +1 more source

Thermoacoustic Analysis of Combustion-Driven Oscillation.

open access: yesTRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1995
Thermoacoustic analysis of heat-driven oscillation with steady flow is performed. Comparing the results with Katto's experiment on the Rijke tube and our experiment on combustion-driven oscillation with multispud gas burner which is previously reported, the following results are obtained : (1) In acoustic-type combustion-driven oscillation, one of the ...
openaire   +2 more sources

Fluid-structure interaction on the combustion instability [PDF]

open access: yes, 2012
The multi-domain problem, the limit cycle behaviour of unstable oscillations in the LIMOUSINE model combustor has been investigated by numerical and experimental studies.
Altunlu, A.C.   +5 more
core   +1 more source

Experimental investigation on the thermoacoustic instability of boron/ethanol nanofluid fuel spray swirling flames

open access: yesApplications in Energy and Combustion Science
Nanofluid fuel has attracted the interest of researchers for decades due to its prominent combustion and propulsive properties. However, combustion instability is inevitable in propulsive systems, and little is known about how nanofluid fuel drive or ...
Meng Wang   +9 more
doaj   +1 more source

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