Time‐History Analysis for Rotorcraft Dynamics Based on a Component Approach

Sopher, R.P.; Hallock, Daniel W.

doi:10.4050/jahs.31.1.43

Cited by 15 publications

(1 citation statement)

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“…and unsteady Reynolds-Averaged Navier-Stokes (URANS) computational fluid dynamics (CFD) solvers coupled with these CSD methods. Comprehensive codes (17)(18)(19)(20)(21) provide rapid prototyping of aerodynamic and structural loading needed for design and time-constrained analysis. These methods utilise finite-element-based structural methods, multi-body dynamics and lower-fidelity aerodynamics, such as lifting-line, dynamic inflow, and prescribed or free wake models to achieve reduced computational requirements.…”

Section: U R ωmentioning

confidence: 99%

Computational aeroelastic analysis of slowed rotors at high advance ratios

Montaudouin

Reveles

Smith

2014

Aeronaut. j. (1968)

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The aerodynamic and aeroelastic behaviour of a rotor become more complex as advance ratios increase to achieve high-speed forward fight. As the rotor blades encounter large regions of cross and reverse flows during each revolution, strong variations in the local Mach regime are encountered, inducing complex elastic blade deformations. In addition, the wake system may remain in the vicinity of the rotor, adding complexity to the blade loading. The aeroelastic behaviour of a model rotor with advance ratios ranging from 0·5 to 2·0 has been evaluated with aerodynamics provided via a computational fluid dynamics (CFD) method. Significant radial blade-vortex interaction can occur at a high advance ratio; the advance ratio at which this occurs is dependent on the rotor configuration. This condition is accompanied by high vibratory loads, peak negative torsion, and peak torsion and in-plane loads. The high vibratory loading increases the sensitivity of the trim model, so that at some high advance ratios the vibratory loads must be filtered to achieve a trimmed state.

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Section: U R ωmentioning

confidence: 99%