Zobrazeno 1 - 10
of 45
pro vyhledávání: '"K. N. C. BRAY"'
A work on turbulent premixed combustion is important because of increased concern about the environmental impact of combustion and the search for new combustion concepts and technologies. An improved understanding of lean fuel turbulent premixed flam
Autor:
K. N. C. Bray, N. Riley
Publikováno v:
Biographical Memoirs of Fellows of the Royal Society. 60:87-106
Flying, and an enthusiasm for aviation, motivated John Clarke’s early career choices: he flew Fairey Fireflys in the Fleet Air Arm, worked in the Gas Turbine Division of Armstrong Siddeley Motors, and studied aeronautical engineering at Queen Mary
Publikováno v:
Journal of Propulsion and Power. 28:1015-1025
The pressure oscillation within combustion chambers of aeroengines and industrial gas turbines is a major technical challenge to the development of high-performance and low-emission propulsion systems. In this paper, an approach integrating computati
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 123:779-786
Combustors with fuel-spray atomizers are susceptible to a low-frequency oscillation, particularly at idle and sub-idle conditions. For aero-engine combustors, the frequency of this oscillation is typically in the range 50–120 Hz and is commonly cal
Autor:
K. N. C. Bray, N. Nikiforakis
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences. 357:3483-3487
All the papers in this issue are concerned with fundamental aspects of combustion theory. Combustion science finds many practical applications in developments leading, for example, to improvements in the efficiency and performance of combustion syste
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 124:20-30
Most types of combustion-driven devices experience combustion instabilities. For aeroengine combustors, the frequency of this oscillation is typically in the range 60–120 Hz and is commonly called “rumble.” The rumble oscillations involve coupl
Autor:
K. N. C. Bray, A.S. Wu
Publikováno v:
Combustion and Flame. 109:43-64
Premixed combustion in turbulent counterflowing streams is studied theoretically by adopting a coherent flame model. With this model, a flame surface density Σ -described by a transport equation—is used to calculate the mean chemical reaction rate
Publikováno v:
Journal of Fluid Mechanics. 332:263-293
In premixed turbulent combustion, the modelling of the turbulent flux of the mean reaction progress variable remains somewhat controversial. Classical gradient transport assumptions based on the eddy viscosity concept are often used while both experi
Publikováno v:
Combustion Science and Technology. 120:357-379
This paper presents a computational study of spray autoignition under conditions similar to those found in Diesel engines. Specifically, liquid n-heptane is injected into a quiescent, hot, high-pressure environment of air. A hybrid approach to the si