Author(s): Iehisa Nezu; Hiroji Nakagawa; Wolfgang Rodi

Linked Author(s): Wolfgang Rodi, Iehisa Nezu, Hiroji Nakagawa

Keywords: No Keywords

Abstract: It_is wel¹-known since Prandt1 that secondary currents occur in straight non-circular closed channels. These secondary currents are often called "cornerflow",because they are directed from the core toward the corners of the duct.Considerable attention has been paid to corner flows in mechanical engineering,because it occurs in many man-made ducts.In the 1960's,some pioneeringexperimental studies on corner flows in square and rectangular ducts wereperformed using hot-wire anemometers(e.g.Leutheusser 1963,Brundrett &Baines 1964,Gessner &Jones 1965,Perkins 1970 and Gessner 1973). In the1970's,accurate measurements of corner flows were made possible by LaserDoppler anemometer(LDA),because no sensor calibration is needed and LDAmeasurements are non-intrusive(e.g.Melling &Whitelaw 1976). As a result,detailed information on corner flows in ducts is now available. An excellentreview on this topic has been written by Bradshaw(1987). Also,many numericalcalculations to reproduce the experimental data of corner flows have beenattempted recently by anisotropic k-e model and algebraic stress model(see e.g.Demuren &Rodi 1984).

DOI:

Year: 1989