Results 201 to 210 of about 4,409 (234)

Effects of intercooling and recuperation on turbofan engine performance

Proceedings of 2011 International Conference on Electronic & Mechanical Engineering and Information Technology, 2011
An overall performance simulation model of the intercooled recuperative aero-engine was built, and an overall performance simulation program was developed. Then, analysis of the effects of intercooling and recuperation on the thermodynamic cycle parameters and performance parameters of the turbofan engine can be carried out.
Hao Gong, Zhan-xue Wang
openaire   +1 more source

Civil turbofan engines thrust generic model

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012
Engine model is one of the most important items in aircraft simulation, because all aircraft stability parameters, as well as its performance in climbing, and accelerated flights, depend on the propulsive force developed by the power plant.
Luis Fajardo Rodriguez, Ruxandra Mihaela Botez   +1 more
openaire   +1 more source

Turbofan engine with reduced noise

The Journal of the Acoustical Society of America, 1998
A noise reduction kit for modifying a two (2) spool axial flow turbofan engine with multi-stage compressors and fan driven by multi-stage reaction turbines, and a thrust of at least about 18,000 lbs. at sea level. There is a fan at the upstream end of the core engine for generating axial fan air flow through bypass ducts terminating at a common nozzle,
openaire   +1 more source

Takeoff characteristics of turbofan engines

Journal of Aircraft, 1990
The present derivation of reliable formulas for the takeoff characteristics of turbofan-powered aircraft, encompassing ground-roll distance and time, fuel consumption, etc, incorporates ground effect-induced drag reduction. This drag reduction factor is varied according to type of aircraft; the turbofans in question may be of high-bypass transport ...
openaire   +1 more source

Exergoeconomic analysis of an aircraft turbofan engine

International Journal of Exergy, 2009
This study deals with an exergoeconomic analysis of an aircraft turbofan engine utilising the kerosene as fuel. A new parameter is developed to define the thrust cost rate. The cost of exergy destruction, the relative cost difference and the exergoeconomic factor are investigated.
Turgut, Enis T., Karakoc, T. Hikmet, Hepbasli, Arif   +2 more
openaire   +3 more sources

ZP/LTR Control for Turbofan Engines

Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, 2000
Among the control methods which have loop transfer recovery ability, such as the LQG/LTR approach, the design of target feedback loop (TFL) is one important step of the procedure for control system design because the performance of the control system designed is limited by its TFL.
Zhengping Feng, Jianguo Sun, Qiuhong Li
openaire   +1 more source

Fan Noise from Turbofan Engines

Journal of Aircraft, 1976
This paper reviews turbomachinery noise from turbofan engines as typified by fan noise. The mechanisms and theories of fan noise are reviewed and concepts for its reduction, including acoustic suppression, are discussed. Correlations of the overall noise data from several full-scale fans tested at NASA Lewis Research Center are presented as indicative ...
Charles E. Feiler, E. William Conrad
openaire   +1 more source

An Altitude Test Facility for Large Turbofan Engines

Journal of Aircraft, 1972
The altitude test facility at NGTE has been progressively developed over many years and now includes a test cell capable of testing large turbofan engines over a wide range of simulated flight conditions. The cell enables measurements to be made during rapid engine transients as well as at steady state conditions.
openaire   +1 more source

Theory and test of flow mixing for turbofan engines

3rd Propulsion Joint Specialist Conference, 1967
For certain applications of advanced turbofan engines, it is advantageous to transport various amounts of the gas-producer kinetic energy to a second stream. The reasons for and the advantages and methods of gasdynamic energy transport (mixing process) are explained with different examples.
openaire   +1 more source

Research Related to Turbofan Engines

Theoretical and Natural Science
The development of aerospace technology has become a topic of daily concern and discussion for the benefit of all mankind. As the global temperature rises, the living environment of human beings is threatened, and scientists have decided to work on the development of aerospace technology in order to solve this problem and meet people's needs.
openaire   +1 more source