Results 41 to 50 of about 8,352,814 (137)
Engineering Applications of Computational Fluid MechanicsCentrifugal fans are widely used in building ventilation and air-conditioning systems but face increasing demands for higher energy efficiency, improved performance, and lower noise levels.
Hamid Motamedi Zokae +2 more
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Aerodynamic and Aeroacoustic Performance of Tail Rotor Investigation and Modification
, 2021 With the increasingly stringent airworthiness standards, the noise generated during the rotorcraft flight is gradually attracting people’s attention. It widely operated helicopters at low altitudes because of their maneuverability. The way to reduce the noise caused by the complex airflow of the helicopter rotor system has progressively become a hot ...
Ai-Peng Hao, Yu-Hong Jia
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Aeroacoustic investigation of deployed spoiler during steep approach landing
, 2009 A steep approach landing procedure utilizes a steeper glide slope, greater than the conventional 3-deg glide angle, in order to alleviate noise on the ground. Spoilers are deployed to slow down the aircraft near to the airport perimeter.
Zhang, Xin +7 more
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Computational Study of Hybrid Propeller Configurations
AerospaceThis study presents the first computational investigation of hybrid propeller configurations that combine toroidal and conventional blade geometries. Using Delayed Detached Eddy Simulation (DDES) with the Shear Stress Transport (SST) k−ω model for flow ...
Mingtai Chen +3 more
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Development of Mixed Flow Fans with Bio-Inspired Grooves
Biomimetics, 2019 Mixed flow fan is a kind of widely used turbomachine, which has faced problems of further performance improvement in traditional design methods in recent decades. Inspired by the microgrooves such as riblets and denticles on bird feathers and shark skins,
Jinxin Wang, Toshiyuki Nakata, Hao Liu
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Applied SciencesThe present numerical study simultaneously investigates the aerodynamic performance, shape optimization, and aeroacoustic characteristics of modified leading-edge wavy wings for the NACA 0020 airfoil.
Ahmet Şumnu
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Introduction: Plant Performance [PDF]
, 2021 Plants perform their own interests and purposes. Plants perform in ways that afford and invite specific human experiences. Plants also perform complex biopolitical roles.
Sandilands, Catriona +2 more
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Progress in Aerodynamic and Aeroacoustic Integration of CROR Propulsion Systems
, 2014 Contra-Rotating Open Rotor (CROR) propulsion systems have seen renewed interest as an economic and environmentally friendly powerplant for future transport aircraft. Installation effects, i.e.
Akkermans, R.A.D. +5 more
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A measurement based study of the acoustics of pipe systems with flow
, 2010 The focus of this thesis is the measurement of specific aeroacoustic properties in ducts at frequencies below the cut-on frequency of the first higher order mode.
English, Emmet J., English, Emmet J
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Study on the effect of bionic flap based on owl wing contour on aerodynamic noise of airfoil
International Journal of Renewable Energy DevelopmentModifying flap geometry to reduce trailing-edge turbulence is an effective approach to lower wind-turbine blade aerodynamic noise. Based on the NACA0018 airfoil, a new bionic serrated flap was designed by mimicking the owl wing structure.
Xian Fan Xie, Liu Chen, Jian Shen Zhu
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