Development of a real-time simulation of a ship-correlated airwake model interfaced with a rotorcraft dynamic model

Clement, W.I.; Gorder, Peter J.; Jewell, W. F.

doi:10.2514/6.1992-4149

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…Time accurate CFD solutions of the LHA are used to provide both steady-state and time-varying airwake velocities that result in local gust disturbances at various locations on the helicopter. The gust penetration model extends previous research on ship airwake and atmospheric turbulence disturbances on helicopters [20,24,25]. In order to simulate approach and departure trajectories, a maneuver controller has been developed [19].…”

Section: Helicopter/ship Dynamic Interface Simulation Modelmentioning

confidence: 87%

Simulation of Helicopter Shipboard Launch and Recovery with Time-Accurate Airwakes

Lee

Sezer-Uzol

Horn

et al. 2005

Journal of Aircraft

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A simulation of the helicopter/ship dynamic interface has been developed and applied to simulate a UH-60A operating from an LHA class ship. Time accurate CFD solutions of the LHA airwake are interfaced with a flight dynamics simulation based on the GENHEL model. The flight dynamics model was updated to include improved inflow modeling and gust penetration effects of the ship airwake. A maneuver controller was used to simulate pilot control inputs for specified approach and departure trajectories. The CFD solutions show significant time varying flow effects in the airwake. Time histories of the aircraft angular rate and pilot control activity indicate that the time varying nature of the airwake has significant effect on aircraft response and pilot workload.

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Section: Helicopter/ship Dynamic Interface Simulation Modelmentioning

confidence: 87%

Simulation of Helicopter Shipboard Launch and Recovery with Time-Accurate Airwakes

Lee

Sezer-Uzol

Horn

et al. 2005

Journal of Aircraft

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“…Flows around ships have so far been computed by several CFD tools (e.g. PHOENICS [17], FAST3D [18], the Finite Element Navier-Stokes Analysis Package (FENSAP) [19], Fluent [20], PUMA2 [21]) coupled with rotor aerodynamic models through one-way coupling, including mean wind velocity models [17,18], three-dimensional approaches based on look-up table aerodynamics [19,20], and time-varying flow model [21]. In other words, so far in published works, the rotorcraft experienced disturbances due to a pre-calculated CFD ship air-wake, but the ship air-wake CFD solutions were unaffected by the downwash of the rotor.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the aerodynamic interaction between a tiltrotor and a tandem rotor during shipboard operations

Tan

Zhou

Sun

et al. 2019

Aerospace Science and Technology

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Numerical investigation of the aerodynamic interaction between a tiltrotor and a tandem rotor during shipboard operations.Abstract: Complex rotorcraft-to-rotorcraft interference problems occur during shipboard operations, and have a negative impact on safety. A vortex-based approach is used here to investigate the flow field and unsteady airloads of a tiltrotor affected by the wake of an upwind tandem rotor. In this work, the blade aerodynamics is modelled using a panel method, and the unsteady behavior of rotor wakes is modelled using a vortex particle method. The effects of the ship and sea-surfaces are accounted for via a viscous boundary model. The method is applied to a 1/48 th scaled model of a CH-46 operating on a model-scale Landing Helicopter Assault ship. The predicted vertical velocities at the location of the downstream V-22 are compared with Computational Fluid Dynamics and experiments carried out at NASA Ames Research Center. The results show that the predicted vertical velocities compare reasonably well with experiments and Computational Fluid Dynamics. A V-22 tilt-rotor placed in the wake of the CH-46 is also simulated, and rolling moments of the V-22 are calculated to show the effect of the upstream CH-46 wake. Keywords: rotorcraft-to-rotorcraft interference; flow field; shipboard operation; vortex particle method; viscous boundary model Nomenclature b, f = edge lengths of a rectangular panel, m b v = the V-22 wing span, m p C = pressure coefficient, dimensionless C P = rotor power coefficient, dimensionless 1 Lecturer, JianfengTan@njtech.edu.cn.

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Investigation on the aerodynamic interaction between a rotor and ship with opened hangar door

Chang

Liu

et al. 2021

Mod. Phys. Lett. B

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Unsteady aerodynamic interference between a rotorcraft and a ship occurs during shipboard launch and recovery operations and has a negative impact on the safety. An experiment of a reduced-scale model rotor and a CFD analysis in hover was carried out to investigate the performance and flow field of a rotor approaching a ship. In this paper, the thrust and pitching moment of the rotor hovering above the ground, deck were tested, and the influence of hangar door on the thrust, pitching moment, and flow field was also measured. A CFD method based on RANS and overset technology was used to investigate the flow field of the rotor operating on the model-scale ship. As the rotor approaches the deck, its thrust first decreases induced by a recirculation near the deck, and then increases induced by the effect of deck, and finally obviously decreases caused by the recirculation near hangar door. The deck and hangar door also affects the flow field to yield an intensive nose-down pitching moment. The status of the hangar door has a significant influence on the rotor thrust and pitching moment. The recirculation is weakened with an opened hangar door resulting in recovery of the rotor thrust and decrease of the nosed down pitching moment.

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Development of a real-time simulation of a ship-correlated airwake model interfaced with a rotorcraft dynamic model

Cited by 5 publications

References 1 publication

Simulation of Helicopter Shipboard Launch and Recovery with Time-Accurate Airwakes

Simulation of Helicopter Shipboard Launch and Recovery with Time-Accurate Airwakes

Numerical investigation of the aerodynamic interaction between a tiltrotor and a tandem rotor during shipboard operations

Investigation on the aerodynamic interaction between a rotor and ship with opened hangar door

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