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Strategies for Modularization and Integration of OVERFLOW into CREATE-AV Helios and Its Applications

AMS Seminar Series

Speaker: Rohit Jain, Aeroflightdynamics Directorate (AFDD), US Army

Presentation

Seminar Slide Deck (PDF-25MB)

Abstract

CREATE-AV Helios is a high-fidelity computational modeling software for rotorcraft, developed under the sponsorship from the DoD CREATE-AV program and the US Army. A key highlight of the Helios software architecture is its modular design approach. Modules of different disciplines communicate through a flexible middleware written in standard Python. The CFD meshing strategy in Helios is to use a triple-mesh paradigm – near-body regions around the rotorcraft components use body-fitted grids structured and/or unstructured, and off-body regions use an adaptive Cartesian grids. The meshes communicate using an overset domain connectivity module. Under a recent effort, the NASA's OVERFLOW CFD solver was modularized and integrated into the Helios system as a near-body structured grid solver. The presentation will discuss the strategies adopted in this integration effort, including the handling of overset grid communications, and show results from a few validation studies including the interactional aerodynamics of the HART-II rotor and hover predictions from the SciTech 2015 S-76 hover prediction workshop. Finally, on-going efforts on modularization of the NASA's FUN3D CFD solver as a Helios near-body unstructured grid solver will also be presented.

Biography

Rohit Jain works at Aeroflightdynamics Directorate (AFDD), US Army, at Ames Research Center. His work is focused on application and development of the CREATE-AV Helios software suite. Previously, he worked at HyPerComp Inc in southern California where he led the development & validation of the CFD-CSD tools for the DARPA Helicopter Quieting Program, and later led the CFD study of active rotors under an Army Phase-II SBIR project. Before that he worked at CFDRC in Huntsville, Alabama on the company's flagship products focused on external aerodynamics of moving bodies. He has an M.S. in Mechanical Engineering from The Ohio State University and a B.S. in Mechanical Engineering from Indian Institute of Technology (IIT) Bombay, India.