Results 71 to 80 of about 336,595 (312)
Interim prediction method for low frequency core engine noise [PDF]
A literature survey on low-frequency core engine noise is presented. Possible sources of low frequency internally generated noise in core engines are discussed with emphasis on combustion and component scrubbing noise.
Clark, B. J., Dorsch, R. G., Huff, R. G.
core +1 more source
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Reduction of Diesel Knock Noise by Controlling Piston Vibration Characteristics
International Journal of Automotive Engineering, 2016 It has been required recently that diesel engines for passenger cars should meet various requirements, such as low noise, low fuel consumption, low exhaust gas emission and high power. The key to improve the noise is to reduce a combustion noise known as
Tsunehiro Mori
doaj +1 more source
Decreased resting and nursing in short-finned pilot whales when exposed to louder petrol engine noise of a hybrid whale-watch vessel. [PDF]
Sci Rep, 2021 Arranz P, Glarou M, Sprogis KR.
europepmc +1 more source
Interior noise prediction methodology: ATDAC theory and validation [PDF]
The Acoustical Theory for Design of Aircraft Cabins (ATDAC) is a computer program developed to predict interior noise levels inside aircraft and to evaluate the effects of different aircraft configurations on the aircraft acoustical environment.
Gardner, Bryce K., Mathur, Gopal P.
core +1 more source
Dual cycle aircraft turbine engine [PDF]
, 1977 A method and apparatus are presented for improving operating efficiency over broad ranges of flight conditions and for reducing jet engine noise output in takeoff and landing by controlling the airflow entering and exiting the engines.
Nichols, M. R.
core +1 more source
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Applied SciencesIn this work, we tested the use of Convolutional Neural Networks (CNNs) to classify booming noise inside vehicles. Instead of relying only on long experimental campaigns, we generated a synthetic dataset from Sound Quality Equivalent (SQE) models that ...
Pedro Leite +4 more
doaj +1 more source
Quiet Clean Short-haul Experimental Engine (QCSEE). Core engine noise measurements [PDF]
Noise measurements were taken on a turbofan engine which uses the same core, with minor modifications, employed on the quiet clean short-haul experimental engine (QCSEE) propulsion systems.
Coward, W. E., Sowers, H. D.
core +1 more source
Advanced Engineering Materials, EarlyView.Creep experiments at 900°C on coarse‐grained steel‐ceramic composites containing recycled magnesia reveal that higher ceramic volume fractions significantly enhance the creep resistance. Detailed EBSD investigations identify subgrain formation in the steel matrix as the dominant deformation mechanism.
Moritz Müller +6 more
wiley +1 more source