Experimental Investigation on High-Reynolds-Number Flows around a 6:1 Prolate Spheroid
Abstract
The flow over a prolate spheroid at incidence involves complex flow physics including 3D flow separation, intrinsic unsteadiness, transitional phenomena, wake asymmetries, coherent vortical structures, sharing its salient features with flows around typical underwater vehicles (e.g., submarines). The proposal concerns an experimental research in the Large Cavitation Tunnel (LCT) at the National Taiwan Ocean University (NTOU) using state-of-the-art probes such as Stereoscopic Particle Image Velocimetry (SPIV), High-Speed Imaging (HIS), and dynamometry. The research will produce a comprehensive experimental database that will shed light on the salient physics of the flow including the turbulent boundary layer, crossflow separation, ensuing vortices and forces and moments on the body. The proposed research will complement the LCC tests being planned in U.S. with the same model shape yet of a larger size. The Reynolds number of the proposed tests (10 million) at NTOU is between prior wind tunnel works and the LCC tests (up to 40 million). Thus, coordination and collaboration between the two tests will greatly benefit both tests, leading to much better understanding of the scale effects. In particular, the proposed effort might allow some U.S.-developed instrumentation to be tested before being deployed at the LCC.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 30, 2019
- Source ID
- N629091912132
Entities
People
- Jiahn-horng Chen
Organizations
- National Taiwan Ocean University
- Office of Naval Research
- United States Navy