Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

TL;DR

This review comprehensively discusses fluid flow and heat transfer in rotor-stator systems with impinging jets, covering experimental, theoretical, and practical aspects across various geometries and flow conditions.

Contribution

It synthesizes recent experimental and computational methodologies for analyzing heat transfer in rotating disk cavities with impinging jets, highlighting future research directions.

Findings

Experimental techniques include thermochromic liquid crystals and laser Doppler velocimetry.

CFD tools like DNS, LES, RANS are used for theoretical analysis.

Various geometries from simple to complex are reviewed.

Abstract

Fluid flow and convective heat transfer in rotor-stator configurations, which are of great importance in different engineering applications, are treated in details in this review. The review focuses on convective heat transfer in predominantly outward air flow in the rotor-stator geometries with and without impinging jets and incorporates two main parts, namely, experimental/theoretical methodologies and geometries/results. Experimental methodologies include naphthalene sublimation techniques, steady state (thin layer) and transient (thermochromic liquid crystals) thermal measurements, thermocouples and infra-red cameras, hot-wire anemometry, laser Doppler and particle image velocimetry, laser plane and smoke generator. Theoretical approaches incorporate modern CFD computational tools (DNS, LES, RANS etc). Geometries and results part being mentioned starting from simple to complex elucidates cases of a free rotating disk, a single disk in the crossflow, single jets impinging onto stationary and rotating disk, rotor-stator systems without and with impinging single jets, as well as multiple jets. Conclusions to the review outline perspectives of the further extension of the investigations of different kinds of the rotor-stator systems and their applications in engineering practice.