Results 11 to 20 of about 336,595 (312)
Study on the Reduction of Gear Whine Noise in Diesel Engine Gear Train [PDF]
한국정밀공학회지, 2019 Noise, Vibration and Harshness (NVH) is a comprehensive issue of manufacturing quality that gives the purchaser a superficial feeling. The NVH performance of the vehicle has undoubtedly become an important factor and basis for consumers.
Qi Zhang +5 more
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Survey of Semi-Empirical Jet Noise Models for Preliminary Aircraft Engine Design
Aerospace, 2023 Scientific research studies on jet noise generation have been ongoing since the early 1950s, when turbojets were first used in commercial aircraft. Several numerical methods have been developed with the aim of reducing the environmental issues related to
Francesco Petrosino, Mattia Barbarino
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Hearing Research, 2017 The US Navy, through an Office of Naval Research (ONR) lead effort on Noise Induced Hearing Loss (NIHL), is investigating methods and techniques to mitigate hearing loss for the crews and warfighters. Hearing protection is a viable and increasingly popular method of reducing hearing exposure for many ship crew members; however, it has limitations on ...
Kurt Yankaskas +3 more
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Main fan noise mitigation technologies in turbofan engines
Aviation, 2014 Aircraft noise and emissions have been of concern since the beginning of commercial aviation. The continuing growth in air traffic and increasing public awareness have made environmental considerations one of the most critical aspects of commercial ...
Fathollah Ommi, Mohammadreza Azimi
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Technologies for jet noise reduction in turbofan engines
Aviation, 2012 Turbofan engines are commonly used for commercial transport due to their advantages of higher performance and lower noise. Jet noise is one of the principal noise sources of turbofan aeroplane engines and remains an acute environmental problem that ...
Mofid Gorji-Bandpy, Mohammadreza Azimi
doaj +1 more source
Applied Sciences, 2021 Hybrid electric propulsion is a promising solution to reduce aircraft emissions, thus improving the sustainability of the air transport. In this work, a hybrid aircraft configuration with a rear-mounted boundary layer ingestion (BLI) engine has been ...
Francesco Petrosino +2 more
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Quantum circuit engineering for correcting coherent noise [PDF]
Physical Review A, 2022 <p>How to correct quantum errors without encoding and parity checks? what forms of real-life quantum noise can actually be reversed on the run-time? and how can we engineer more noise-robust quantum circuits? learn more on these new findings in this PRA research article. </p>
Muhammad Ahsan +2 more
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Shock and Vibration, 2018 Internal combustion engine noise sources are complex and changeable. Combustion noise is usually drowned out by mechanical noise and aerodynamic noise. Traditional noise source identification methods can only qualitatively identify combustion noise.
Yang Xiang +4 more
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International Journal of Automotive Engineering, 2012 This study investigates the characteristics of combustion noise generation in a diesel engine under running condition using wavelet transformation and transient combustion-noise-generation model. The results show that combustion noise largely contributed
Nguyen uan Anh +2 more
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Bulletin of JSME, 1974 In this study, an attempt was made to separate the combustion noise and the mechanical noise from the engine noise by estimating the transfer coefficient between the cylinder pressure spectrum and sound pressure spectrum of noise in a four-stroke diesel engine.
Tadashi MURAYAMA +2 more
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