Results 101 to 110 of about 17,951 (234)

Abating exhaust noises in jet engines [PDF]

, 1974
A noise abating improvement for jet engines including turbojets, turbofans, turboprops, ramjets, scramjets, and hybrid jets is introduced. A provision is made for an apparatus in the primary and/or secondary flow streams of the engines; the apparatus ...
Schwartz, I. R.
core   +1 more source

Neural network model for fast prediction of infrared radiation of turbofan engine with axisymmetric exhaust system in preliminary design phase

Case Studies in Thermal Engineering
It is widely agreed that the infrared stealth should be considered in the preliminary design phase of turbofan engine so as to decrease the infrared radiation of engine exhaust system.
Feng Wang, Honghu Ji, Haoying Chen, Xinlei Chen, Mingxin Wang, Xiaojuan Shi   +5 more
doaj   +1 more source

Acoustic modal analysis of a full-scale annular combustor [PDF]

An acoustic modal decomposition of the measured pressure field in a full scale annular combustor installed in a ducted test rig is described. The modal analysis, utilizing a least squares optimization routine, is facilitated by the assumption of randomly
Karchmer, A. M.
core   +1 more source

Terminal-shock and restart control of a Mach 2.5, mixed compression inlet coupled to a turbofan engine [PDF]

Results of an experimental program conducted on a mixed-compression inlet coupled to a turbofan engine are presented. Open-loop frequency response data are presented that show the response of shock position (as measured by an average inlet static ...
Batterton, P. G., Baumbick, R. J., Daniele, C. J.   +2 more
core   +1 more source

Optimized modeling of energy and environmental metrics of mixed flow turbofan engine used regional aircraft. [PDF]

J Therm Anal Calorim, 2023
Uçar UU, Aygun H, Tanyeri B.
europepmc   +1 more source

Effect of forward motion on engine noise [PDF]

Methods used to determine a procedure for correcting static engine data for the effects of forward motion are described. Data were analyzed from airplane flyover and static-engine tests with a JT8D-109 low-bypass-ratio turbofan engine installed on a DC-9-
Blankenship, G. L., Low, J. K. C., Merriman, J. E., Watkins, J. A.   +3 more
core   +1 more source

Application of 3-signal coherence to core noise transmission [PDF]

A method for determining transfer functions across turbofan engine components and from the engine to the far-field is developed. The method is based on the three-signal coherence technique used previously to obtain far-field core noise levels.
Krejsa, E. A.
core   +1 more source

Failure Mode and Effects Analysis on the Air System of an Aero Turbofan Engine Using the Gaussian Model and Evidence Theory. [PDF]

Entropy (Basel), 2023
Tang Y, Zhou Y, Zhou Y, Huang Y, Zhou D.
europepmc   +1 more source

Advanced supersonic technology propulsion system study [PDF]

This study had the objectives of determining the most promising conventional and variable cycle engine types; the effect of design cruise Mach number (2.2, 2.7 and 3.2) on a commercial supersonic transport; effect of advanced engine technology on the ...
Allan, R. D., Szeliga, R.
core   +1 more source

Study of a turbofan engine

, 2014
The aim pursued by this project is to show the design of a complete turbofan. Because this design process is very complex and large groups of engineers for their development typically need the scope thereof in a final project is very limited. However, attempts to give an overview of what this design process and show the way forward from the work done ...
openaire   +2 more sources