Experimental heat transfer study of Endwall in a linear cascade with IR thermography
Paper i proceeding, 2014

This abstract presents an endwall heat transfer experimental data of air flow going through outlet guide vanes (OGVs) situated in a low speed linear cascade. The measurement technique for this experiment was infrared thermography. In order to calculate the heat transfer coefficient (HTC) on the endwall, it has been used an instrumented window with a controlled constant temperature in one side of a 5 millimeter Plexiglass in order to generate high temperature gradients and, therefore, by measuring the surface temperature one the other side of the Plexiglass, it is calculated the HTC. Due to the fact that Plexiglass material has not good optical properties at infrared spectrum, it has been used a thin layer of black paint (10-12 μm) which has high emissivity (0.973) in the range of temperature that we are working. The Reynolds number for this experiment is 300000 in on and off-design configuration of the OGVs (on-design 25° and off-design cases are 40° and-25° incident angle). Furthermore, the on-design case is run at two different Reynolds number, 300000 and 450000. During this experiments it can be seen how changing the inlet angle to the OGVs produces significant differences on the heat transfer along the endwall. The main objective for this investigation is to study the heat transfer along the endwall of a linear cascade so that it would be a well-defined test case for CFD validation.

Författare

Borja Rojo

Chalmers, Tillämpad mekanik, Strömningslära

Carlos Jimenez Sanchez

Chalmers, Tillämpad mekanik, Strömningslära

Valery Chernoray

Chalmers, Tillämpad mekanik, Strömningslära

EPJ Web of Conferences

21016275 (ISSN) 2100014X (eISSN)

Vol. 67 02100

Ämneskategorier

Maskinteknik

Fysik

Strömningsmekanik och akustik

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Fundament

Grundläggande vetenskaper

DOI

10.1051/epjconf/20146702100

ISBN

9788026053750