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Publications (7)
The reduction of intake noise is a very important factor in controlling the interior noise levels of vehicles, particularly at low and major engine operating speeds. A vehicle intake system generally consists of air cleaner box, hose, duct, and filter element. Also, resonators and porous duct are included, being used to reduce intake noise. For mor...
In this paper, an accurate structural dynamic analysis was developed for a helicopter rotor system including rotor control components, which was coupled to various aerodynamic and wake models in order to predict an aeroelastic response and the loads acting on the rotor. Its blade analysis was based on an intrinsic formulation of moving beams implem...
Many investigations have been conducted to understand blade-vortex interaction (BVI) and the resulting acoustic noise so that they may reduce the rotorcraft's noise. For an accurate understanding of BVI, complex motion of an elastic rotor blade needs to be predicted. Japan Aerospace Exploration Agency (JAXA) has developed its own CFD analysis using...
Helicopter rotor exhibits an environment different from that of a fixed-wing aircraft due to its complex aerodynamic condition as well as different structural behavior. To understand the helicopter's characteristics and alleviate problems caused by these phenomena, it is required to develop an accurate aeroelastic analytical tool. To describe the s...
This paper presents a combination of a computational structural dynamics (CSD) and high fidelity computational fluid dynamics (CFD) analysis which is based on overset structured grid. Regarding a helicopter rotor in hover, aerodynamic loads are computed from the three-dimensional Euler/Navier-Stokes solver in overlapped grids, and blade motions are...
This paper presents a combination of a computational structural dynamics (CSD) and high fidelity unsteady computational fluid dynamics (CFD) analysis. Regarding a helicopter in hover, aerodynamic loads are computed from the three-dimensional Navier-Stokes solver in overlapped grids, and blade motions are obtained from the geometrically exact rotor...
