Results 21 to 30 of about 37,579 (262)
Noise-Source Identification for Ducted Fan Systems [PDF]
AIAA Journal, 2007 Coherence-based source analysis techniques can be used to identify the contribution of combustion noise in the exhaust of a jet engine and to hence enable the design of noise-reduction devices. However, when the combustion noise propagates in a nonlinear fashion, the identified contribution using ordinary coherence methods will be inaccurate.
BENNETT, GARETH, FITZPATRICK, JOHN AIDAN
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Utjecaj radijalnog i aksijalnog razrmaka na emitiranu buku i performance ventilatora
Promet (Zagreb), 2012 Among all auxilimy units of the air cooled diesel engine acooling fan is the noisiest. One of the noise generation mechanismsis the blade interaction with the vortices occurring in theradial and axial clearances of the fan due to the pressure ...
Mirko Čudina
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The Journal of the Acoustical Society of America, 1959 Many of the phenomena of noise of fans can be predicted from the simple assumption that the source of noise power is a pressure pulse created by the motion of the blade or impellor. From this assumption the well known fan sound laws can be derived: (1) the sound power varies as the fifth power of the blade tip speed, and (2) the sound power is ...
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Application of Wake Characteristics to Prediction of Broadband Noise of a Multiblade Fan
Journal of Fluid Science and Technology, 2008 In this study, the wake characteristics of an arc blade were measured by the wind tunnel experiment; the characteristics were defined as the width of the wake, diameter of the vortex, ratio of the vortex scale, and the local lift.
Soichi SASAKI, Hidechito HAYASHI
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Directed evolution of enzymes at the crossroads of tradition and innovation
FEBS Open Bio, EarlyView.An iterative cycle of data‐driven enzyme optimization comprising four stages: genetic diversification of a template enzyme, expression of protein variants, high‐throughput evaluation, and machine‐learning‐guided redesign of the next variant library.
Maria Tomkova +2 more
wiley +1 more source
Aerodynamic noise characteristics of a centrifugal fan in high-altitude environments.
PLoS ONEIn high-altitude areas, the air is thin and the atmospheric pressure is low, which can affect the performance of centrifugal fans and aerodynamic noise.
Xue Liu, Jian Liu
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FEBS Open Bio, EarlyView.Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty +13 more
wiley +1 more source
Impact of the turbulence modeling approach on the accuracy of the fan noise level prediction
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018 The fan is the dominant source of noise for modern high bypass ratio aircraft engines. The article presents the results of investigating the influence of the approach to modeling the turbulence in modeling fan stage noise generation on the results of ...
K. R. Pyatunin, N. V. Arkharova
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Applied Sciences, 2020 Low-speed axial cooling fans are frequently used to manage engine temperature by ensuring that adequate quantities of air pass through heat exchangers, even at low vehicle speeds or in the idle condition. This study aims to provide a better understanding
Jang-oh Mo, Jae-hyuk Choi
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Protocol for quantifying miRNA trafficking across the endosomal membrane
FEBS Open Bio, EarlyView.An in vitro protocol measures miRNA uptake into endosomes isolated from mammalian cell extracts, which are free of subcellular contaminants. Performed at 37 °C in the presence of ATP, it ensures the import of single‐stranded miRNA into the endosomal lumen.
Syamantak Ghosh +2 more
wiley +1 more source