Erscheint 8 Ausgaben pro Jahr
ISSN Druckformat: 1065-5131
ISSN Online: 1563-5074
IF:
2.3
5-Year IF:
1.8
Immediacy Index:
0.2
Eigenfactor:
0.00037
JCI:
0.6
SJR:
0.433
SNIP:
0.593
CiteScore™::
4.3
H-Index:
35
Indexed in
Thermochemical Protection of High Temperature Materials
Get access
ABSTRAKT
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.
-
Goldstein R.J, Eckert E.R.G, Ibele W.E, Patankar S.V, Simon T.W, Kuehn T.H, Strykowski P.J, Tamma K.K, Heberlein J.V.R, Davidson J.H, Bischof J, Kulacki F.A, Kortshagen U, Garrick S, Heat transfer––a review of 2001 literature, International Journal of Heat and Mass Transfer, 46, 11, 2003. Crossref