Results 71 to 80 of about 2,655 (199)
A generalized computer code for developing dynamic gas turbine engine models (DIGTEM) [PDF]
This paper describes DIGTEM (digital turbofan engine model), a computer program that simulates two spool, two stream (turbofan) engines. DIGTEM was developed to support the development of a real time multiprocessor based engine simulator being designed ...
Daniele, C. J.
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Reduction of commercial aircraft noise emission around airports. A new environmental challenge [PDF]
, 2009 Noise abatement procedures (NAPs) are considered as a necessary measure for a balanced approach of noise control around airports. Their correct implementation depends upon many factors, which vary in operation and influence the efficiency of the NAPs ...
Salah Khardi
core +3 more sources
Experimental study of ceramic coated tip seals for turbojet engines [PDF]
Ceramic gas-path seals were fabricated and successfully operated over 1000 cycles from flight idle to maximum power in a small turboshaft engine. The seals were fabricated by plasma spraying zirconia over a NiCoCrAlX bond boat on the Haynes 25 substrate.
Biesiadny, T. J. +5 more
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MachinesFrom advanced research platforms to Unmanned Aerial Vehicles (UAVs), Micro Turbojet Engines (MTEs) have grown to be essential parts in many different kinds of applications.
Ahmed M. Shehata, Marco P. Schoen
doaj +1 more source
Microprocessor-based multichannel flutter monitor using dynamic strain gage signals [PDF]
Two microprocessor-based multichannel monitors for monitoring strain gage signals during aerodynamic instability (flutter) testing in production type turbojet engines were described. One system monitors strain gage signals in the time domain and gives an
Smalley, R. R.
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Summary of NASA research on thermal-barrier coatings [PDF]
A durable, two-layer, plasma-sprayed coating consisting of a ceramic layer over a metallic layer was developed that has the potential of insulating hot engine parts and thereby reducing metal temperatures and coolant flow requirements and/or permitting ...
Liebert, C. H. +2 more
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Electrostatic Signal Self-Adaptive Denoising Method Combined with CEEMDAN and Wavelet Threshold
AerospaceA novel low-pass filtering self-adaptive (LPFA) denoising method combining complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN) and a wavelet threshold (WT) strategy is proposed to solve the problem of the aero-engine gas-path ...
Yan Liu +5 more
doaj +1 more source
NASA thermal barrier coatings: Summary and update [PDF]
A durable, two-layer, plasma-sprayed coating consisting of a ceramic layer over a metallic layer was developed that has the potential of insulating hot engine parts and thereby reducing metal temperatures and coolant flow requirements and/or permitting ...
Stepka, F. S.
core +1 more source
The long term evolution of vertically-related industries [PDF]
The paper develops the argument that the long-term structural evolution of an industry depends on the evolution of a vertically-related, downstream industry. We analyse two pairs of vertically-related industries, the jet and turboprop aircraft and engine
Andrea Bonaccorsi, Paola Giuri
core
Measured noise reductions resulting from modified approach procedures for business jet aircraft [PDF]
Five business jet airplanes were flown to determine the noise reductions that result from the use of modified approach procedures. The airplanes tested were a Gulfstream 2, JetStar, Hawker Siddeley 125-400, Sabreliner-60 and LearJet-24.
Burcham, F. W., Jr. +3 more
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