Instrumentation for time-resolved rotating frame of reference volumetric velocimetry of rotor flows
Abstract
Three-dimensional unsteady flow separation on rotor blades of a helicopter severely limit the maximum forward flight speed. While much progress has been made towards understanding this problem, it has become apparent the inclusion of three-dimensional rotational effects are critical to make further advances. Here it is important to accurately quantify three-dimensional, unsteady, and rotating vortex laden flow and its interaction with the rotating blade. To this end, the PI is currently developing and applying a novel rotating frame of reference volumetric velocimetry technique to study three-dimensional flow separation on a hovering lower Reynolds number rotating blade in a bench-scale water tank. This proposed suite of instrumentation is to exploit recent breakthroughs in high-speed diagnostic methods to investigate flows relevant to high-speed rotorcraft problems, and generally to the science of unsteady three-dimensional vortical and rotating flows. With this new suite of instrumentation, for the first time, the PI will be able to experimentally measure time-resolved high-fidelity volumetric velocity fields in the rotating frame of reference. These measurements will be used to bridge the gap in our current understanding of unsteady flow separation on a rotating wing.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 20, 2019
- Source ID
- W911NF1910124
Entities
People
- Vrishank Raghav
Organizations
- Army Contracting Command
- Auburn University
- United States Army