Results 111 to 120 of about 92,929 (279)

Results and status of the NASA aircraft engine emission reduction technology programs [PDF]

The results of an aircraft engine emission reduction study are reviewed in detail. The capability of combustor concepts to produce significantly lower levels of exhaust emissions than present production combustors was evaluated. The development status of
Diehl, L. A., Grobman, J., Jones, R. E., Petrash, D. A.   +3 more
core   +1 more source

Experimental Study of Ignition Characteristics in Oblique-Injected Annular Combustors Using a Pre-Chamber Ignition System

Aerospace Research Communications
In this work, a pre-chamber ignition system is used to initiate the ignition in a premixed oblique-injected annular combustor. Although the introduction of the oblique-injecting burner in the gas turbine improved the gyratory flow motion and flow ...
Haroun Hassan, Haroun Hassan, Chenghao Qian, Hui Wang, Jinxiang Zhu, Haiwen Ge, Elsayed Barakat, Elsayed Barakat, Elsayed Barakat, Gaofeng Wang   +9 more
doaj   +1 more source

Pollution reduction technology program for small jet aircraft engines: Class T1 [PDF]

, 1977
Small jet aircraft engines (EPA class T1, turbojet and turbofan engines of less than 35.6 kN thrust) were evaluated with the objective of attaining emissions reduction consistent with performance constraints.
Bruce, T. W., Davis, F. G., Mongia, H. C.   +2 more
core   +1 more source

Advanced low-NO(x) combustors for supersonic high-altitude gas turbines [PDF]

, 1977
The impact of gas-turbine-engine-powered aircraft on worldwide pollution was defined within two major areas of contribution. First, the contribution of aircraft to the local air pollution of metropolitan areas and, second, the long-term effects on the ...
Roberts, P. B.
core   +1 more source

Research on substitutability of single-dome versus triple-dome center staged combustor

Case Studies in Thermal Engineering
To investigate the substitutability of the simulation results using the single-dome combustor as the computational domain to the triple-dome combustor, three-dimensional numerical simulations were conducted on both models and the differences in various ...
Duo Wang, Feng Li, Hongjun Lin, Tao Zhou, Kai Zhao   +4 more
doaj   +1 more source

Experimental combustor study program [PDF]

, 1980
Advanced combustor concepts are evaluated as a means of accommodating possible future broad specification fuels. The three advanced double annular combustor concepts consisted of (1) a concept employing high pressure drop fuel nozzles for improved ...
Ekstedt, E. E., Kasper, J. M.
core   +1 more source

Shock wave enhanced turbulent mixing in a wide-speed-range strut-based scramjet combustor

Propulsion and Energy
The efficient mixing of fuel and oxidizer in a scramjet combustor is a critical issue for achieving future wide-speed-range flight. A numerical study is conducted using Reynolds-averaged Navier–Stokes equations coupled with shear stress transport k-ω ...
Xiaofei Niu, Qian Chen
doaj   +1 more source

Effect of ambient temperature and humidity on emissions of an idling gas turbine [PDF]

, 1977
The effects of inlet pressure, temperature, and humidity on the oxides of nitrogen produced by an engine operating at takeoff power setting were investigated and numerous correction factors were formulated.
Kauffman, C. W.
core   +1 more source

Combustion overview [PDF]

, 1984
The objective of this effort is to develop improved analytical models of the internal combustor flow field and liner heat transfer as a means to shorten combustor development time and increase turbine engine hot section life.
Schultz, D. F.
core   +1 more source

Combustion performance of n-butane-fueled mesoscale annular combustor

Journal of Thermal Science and Technology
The lower vapor pressure of n-butane than gaseous fuels, such as hydrogen, methane, and propane, enables its fuel containers to be compact and highly portable.
Yosuke SUENAGA, Hideki YANAOKA
doaj   +1 more source