Nahon, Jeremy; Zangeneh, Mehrdad; Nohmi, Motohiko; Watanabe, Hiroyoshi; Goto, Akira; (2021) A robust inverse design solver for controlling the potential aggressiveness of cavitating flow on hydrofoil cascades. International Journal for Numerical Methods in Fluids , 93 (7) pp. 2291-2310. 10.1002/fld.4974.

Preview

Text 17030226-proof.pdf - Other Download (2MB) | Preview

Abstract

This article presents the development of a new inverse design algorithm capable of generating blade geometries for cavitating cascade flows. With this methodology, we demonstrate the controllability of the pressure distribution in and around the cavity and thereby provide a means to regulate the aggressiveness of blade cavitation phenomena. The solver proposed here uses the Tohoku–Ebara equation of state to model phase change, combined with bespoke preconditioning and multigrid methods designed to handle the system's ill conditioning and cope with the hypersonic flow regime of the mixture, respectively. Blade geometries and the cavitating flow field are calculated simultaneously in a robust and efficient manner, with a blade loading that matches the target distribution. In this article, the accuracy of the cavitating flow solver is first demonstrated for the NACA0015 hydrofoil case and associated experimental data. The inverse design procedure is then applied to a typical axial flow pump cascade: a new blade profile is generated with a topology that successfully reduces the gradient of the pressure jump at cavity closure.

Download activity - last month

Export as CSVXMLJSON

Download activity - last 12 months

Export as CSVJSONXML

Downloads by country - last 12 months

Export as CSVXMLJSON

Archive Staff Only

View Item