Turbulent Transition Simulation by Using a Two-Equation Model

This paper describes a novel approach in simulating laminar to turbulent transition by using two-equation models. The Total Stresses Limitation(TSL) concept is used to make the two-equation model capable of predicting high Reynolds number transitional ow. To consider the transition triggered by laminar separation at low Reynolds number location, which commonly occurs in high speed ow, a sensor is introduced to detect separation and trigger transition in the separated zone. Test cases include the classical at-plate turbulent boundary ows, and low-pressure turbine cascade ows at design and oo-design conditions.