Experimental lifetime study of regeneratively cooled rocket chamber walls

•Provocation of the ’doghouse’ failure mode under well-defined conditions.•Effects of various load conditions on the lifetime of thrust chamber walls.•Progression of deformations and surface roughness of thrust chamber walls.•Effects and behavior of thermal barrier coatings under hot-gas conditions....

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Bibliographic Details
Published in:International journal of fatigue 2020-09, Vol.138, p.105649-12, Article 105649
Main Authors: Hötte, Felix, Sethe, Christoph v., Fiedler, Torben, Haupt, Matthias C., Haidn, Oskar J., Rohdenburg, Michael
Format: Article
Language:English
Subjects:
Abrasion
Aerospace
Blanching
Combustion chambers
Constraining
Copper alloys
Corrosion fatigue
Failure modes
Materials fatigue
Plasticity
Rocket engines
Surface roughness
Thermal barrier coatings
Thermomechanical fatigue/cycling
Thrust chambers
Walls
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Summary:•Provocation of the ’doghouse’ failure mode under well-defined conditions.•Effects of various load conditions on the lifetime of thrust chamber walls.•Progression of deformations and surface roughness of thrust chamber walls.•Effects and behavior of thermal barrier coatings under hot-gas conditions.•Discussion of lifetime limiting mechanisms in rocket combustion chambers. A detailed knowledge of the life-limiting mechanisms of regeneratively cooled rocket combustion chambers is important to increase the safety, the thrust-to-weight ratio and the cost-efficiency of future rocket engines. For this purpose, an actively cooled specimen made of CuCr1Zr is mounted downstream of a combustion chamber. The specimen is loaded cyclically and inspected after each cycle. The specimens collapse in the ’doghouse’ failure mode after several load cycles. The effects of different hot-gas and coolant conditions, surface roughness and thermal barrier coatings on the lifetime are studied. The life-limiting mechanisms: creeping, yielding, abrasion, blanching and thermal aging are discussed.
ISSN:0142-1123
1879-3452
DOI:10.1016/j.ijfatigue.2020.105649