Pneumodynamic characteristics of a circulation control rotor model
Abstract
Numerical and experimental simulation of unsteady airflow through the control valve and slotted air duct of a circulation control rotor are described. The numerical analysis involves the solution of the quasi-one-dimensional compressible fluid-dynamic equations in the blade air duct together with the coupled isentropic flow equations for flow into the blade through the valve and out of the blade through the Coanda slot. Numerical solutions are compared with basic experimental results obtained for a mockup of a circulation control rotor and its pneumatic valving system. The pneudynamic phenomena that were observed are discussed with particular emphasis on the characteristic system time lags associated with the response of the flow variables to transient and periodic control valve inputs.
- Publication:
-
American Helicopter Society Journal
- Pub Date:
- July 1985
- Bibcode:
- 1985AHSJ...30...23W
- Keywords:
-
- Air Ducts;
- Air Flow;
- Circulation Control Rotors;
- Control Valves;
- Pneumatic Control;
- Unsteady Flow;
- Compressible Flow;
- Finite Difference Theory;
- Mass Flow;
- One Dimensional Flow;
- Pressure Distribution;
- Fluid Mechanics and Heat Transfer