Author

Mithun Varma

Advisor

Thompson, David S.

Committee Member

Luke, Edward

Committee Member

Walters, Keith

Date of Degree

1-1-2006

Document Type

Graduate Thesis - Open Access

Major

Aerospace Engineering

Degree Name

Master of Science

College

College of Engineering

Department

Department of Aerospace Engineering

Abstract

Computational investigations were carried out to evaluate the effectiveness and usability of hybrid RANS/LES techniques for predicting the unsteady separated flow over wings with ice accretion. RANS and hybrid RANS/LES computations were performed using the viscous flow solver CHEM with the SST turbulence model. Two configurations were considered during the study: an extruded wing with a glaze-ice shape and a swept wing with a simulated glaze-ice accretion. Hybrid RANS/LES results, in general, predict a less active shear layer ``roll up' than seen in the experimental data. Qualitative improvements are seen in the hybrid RANS/LES results over corresponding RANS results. The extruded wing results show that the CHEM hybrid RANS/LES results are similar to the AVUS DES results. The use of preconditioning and a different turbulent model in CHEM showed a slight improvement in results.

URI

https://hdl.handle.net/11668/17226

Comments

CFD||DES||AIRCRAFT ICING||HYBRID RANS/LES

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