Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
Journal of Enhanced Heat Transfer
IF: 0.562 5-Year IF: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN Print: 1065-5131
ISSN Online: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v8.i4.20
pages 231-241

Thermochemical Protection of High Temperature Materials

J. Stricker
Faculty of Aerospace Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
Y. Goldman
Faculty of Aerospace Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
Genady Borodyanski
Israel Institute of Technology
heat engineering

ABSTRACT

An experimental investigation of cooling and heat protection of high temperature objects, by a method based on endothermic chemical reactions is presented. The coolant is CH4 which reacts endothermally with CO2 and H2O. CO2 and H2O are supplied as hot products by hydrocarbon fuel combustion and are also used for heating the tested objects. The method is demonstrated by cooling a hollow tube, and gas turbine blades. Significant wall temperature reduction, of ΔT ≅ 300 K as compared to ΔT = 150 K with inert nitrogen cooling, was obtained for wall temperature of Tw = 1050 K. It was found that at lower temperatures the cooling effectiveness decreases due to the slow rate of the chemical reactions. At higher temperatures the cooling rate remains constant due to diffusion limitations. Moire deflectometry has been used for visualization and qualitative study of the density field around the cooled objects. The cooling method is limited to fuel rich combustion mixtures.


Articles with similar content:

Chlorinated Waste Destruction by Plasma Pyrolysis
Progress in Plasma Processing of Materials, 1997, Vol.1, 1997, issue
Z. Kolacinski, K. Cedzynska
GOLD CATALYSTS FOR H2 PRODUCTION AND PURIFICATION
HYSYDAYS
1st World Congress of Young Scientists on Hydrogen Energy Systems, Vol.0, 2005, issue
Flora Boccuzzi, Maela Manzoli, Anna Chiorino, Floriana Vindigni
ENHANCEMENT OF COOLING CAPACITY OF A VORTEX TUBE
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
P. A. Ramakrishna, Rutika Godbole
A Novel Porous Membrane Reactor for a Controllable Butene Oxidative Reaction
Journal of Porous Media, Vol.4, 2001, issue 3
Shanhai Ge, Changhou Liu, Lianjun Wang, Zhihua Li
Heat Transfer of Film Cooling on a Radially Rotating Cylinder
International Heat Transfer Conference 11, Vol.18, 1998, issue
Y. J. Cheng, G. J. Hwang