Turbulent flow between two disks contrarotating at different speeds

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of Turbomachinery

DOI:https://doi.org/10.1115/1.2836656· OSTI ID:250828

Kilic, M; Gan, X; Owen, J M ^[1]

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1. Univ. of Bath (United Kingdom). School of Mechanical Engineering

This paper describes a combined computational and experimental study of the turbulent flow between two contrarotating disks for {minus}1 {le} {Gamma} {le} 0 and Re{sub {phi}} {approx} 1.2 {times} 10{sup 6}, where {Gamma} is the ratio of the speed of the slower disk to that of the faster one and Re{sub {phi}} is the rotational Reynolds number. The computations were conducted using an axisymmetric elliptic multigrid solver and a low-Reynolds-number {kappa}-{epsilon} turbulence model. Velocity measurements were made using LDA at nondimensional radius ratios of 0.6 {le} x {le} 0.85. For {Gamma} = 0, the rotor-stator case, Batchelor-type flow occurs: There is radial outflow and inflow in boundary layers on the rotor and stator, respectively, between which is an inviscid rotating core of fluid where the radial component of velocity is zero and there is an axial flow from stator to rotor. For {Gamma} = {minus}1, antisymmetric contrarotating disks, Stewartson-type flow occurs with radial outflow in boundary layers on both disks and inflow in the viscid nonrotating core. At intermediate values of {Gamma}, two cells separated by a streamline that stagnates on the slower disk are formed: Batchelor-type flow and Stewartson-type flow occur radially outward and inward, respectively, of the stagnation streamline. Agreement between the computed and measured velocities is mainly very good, and no evidence was found of nonaxisymmetric or unsteady flow.

• Sponsoring Organization: USDOE
• OSTI ID: 250828
• Report Number(s): CONF-940626--
• Journal Information: Journal of Turbomachinery, Journal Name: Journal of Turbomachinery Journal Issue: 2 Vol. 118; ISSN JOTUEI; ISSN 0889-504X
• Country of Publication: United States
• Language: English

Related Subjects

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33 ADVANCED PROPULSION SYSTEMS
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TURBULENT FLOW