Floor motion's influence on wake asymmetry of a notchback bluff body
Artikel i vetenskaplig tidskrift, 2022

Large eddy simulations are used to explore the influence of floor motions on asymmetric flows around a notchback bluff body. The focus of this study is on the aerodynamic forces and the extent of natural wake asymmetry presented under moving and stationary ground conditions. The different ground condition has a notable influence on the aerodynamic force and the surrounding pressure distribution of the body. On the other hand, the wake asymmetry, known to be a sensitive phenomenon, is not evidently affected by the floor motion. However, quantitative analysis of the averaged and the statistic flow still suggests slight differences in the degree of wake asymmetry between the two ground conditions. Modal analysis applying proper orthogonal decomposition confirms that the asymmetric wake dynamics and the wake shedding frequency are not sensitive to the floor motion. The accuracy of the numerical simulation is established by a grid-independence study.

Författare

Kan He

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Central South University

Guglielmo Minelli

Volvo Cars

Xinchao Su

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Jiabin Wang

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Guangjun Gao

Central South University

Sinisa Krajnovic

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Physics of Fluids

1070-6631 (ISSN) 1089-7666 (eISSN)

Vol. 34 3 035103

Ämneskategorier

Teknisk mekanik

Farkostteknik

Strömningsmekanik och akustik

DOI

10.1063/5.0084435

Mer information

Senast uppdaterat

2022-03-21