Experimental and numerical investigations of thermo-mechanical fluid-structure interaction in cooled rocket combustion chambers

Hötte, Felix; Lungu, Paul; Haupt, Matthias; Haidn, Oskar

doi:10.2514/6.2018-4767

Cited by 2 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In comparison to the previous test campaigns A and B, which are described in detail in [9], in the actual campaigns C-K a much more stable combustion could be achieved. In campaigns C-G the combustion chamber pressure was increased slightly to accelerate the thermo-mechanical fatigue by higher temperatures and heat fluxes, whereas the cooling conditions were not changed.…”

Section: Introductionmentioning

confidence: 74%

“…The deformation development in campaign B is very erratic. It is assumed that this is a consequence of the combustion instabilities in some tests (see [9]. The comparison of campaigns C and E shows that a small increase of the hot gas heat flux (because of the higher roughness) decreases the lifetime by factor 3.…”

Section: Deformations and Lifetimementioning

confidence: 99%

“…4 Doghouse shape at the end of test campaign C [8] for details). Thermal aging was investigated with micrographs after campaign B in [9]. No correlation between grain size distribution and temperature distribution was found.…”

Section: Deformations and Lifetimementioning

confidence: 99%

“…(a) Fatigue segment cut view (Reprinted by permission from Springer Nature[6]), cut position marked as A-A inFig. 1(b)(b) Fatigue specimen top view with flow directions and measurement positions (Reprinted by permission from Felix Hötte[9] …”

mentioning

confidence: 99%

See 3 more Smart Citations

Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct

Hötte

Günther

Sethe

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

Self Cite

View full text Add to dashboard Cite

This paper aims at experimental investigations of the life limiting mechanisms of regeneratively cooled rocket combustion chambers, especially the so called doghouse effect. In this paper the set up of a cyclic thermo-mechanical fatigue experiment and its results are shown. This experiment has an actively cooled fatigue specimen that is mounted downstream of a subscale GOX-GCH$$_{\text {4}}$$ combustion chamber with rectangular cross section. The specimen is loaded cyclically and inspected after each cycle. The effects of roughness, the use of thermal barrier coatings, the length of the hot gas phase, the oxygen/fuel ratio and the hot gas pressure are shown. In a second experiment the flow in a generic high aspect ratio cooling duct is measured with the Particle Image Velocimetry (PIV) to characterize the basic flow. The main focus of the analysis is on the different recording and processing parameters of the PIV method. Based on this analysis a laser pulse interval and the window size for auto correlation is chosen. Also the repeatability of the measurements is demonstrated. These results are the starting point for future measurements on the roughness effect on heat transfer and pressure loss in a high aspect ratio cooling duct.

show abstract

Section: Introductionmentioning

confidence: 74%

Section: Deformations and Lifetimementioning

confidence: 99%

Section: Deformations and Lifetimementioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct

Hötte

Günther

Sethe

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Transregio 40 subproject D9's fatigue experiment (see [13,14]) is used as reference configuration. It serves as a basis for extensive measurements which are further used for validation.…”

Section: Introductionmentioning

confidence: 99%

Pseudo-transient 3D Conjugate Heat Transfer Simulation and Lifetime Prediction of a Rocket Combustion Chamber

Barfusz

Hötte

Reese

et al. 2020

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

Self Cite

View full text Add to dashboard Cite

Rocket engine nozzle structures typically fail after a few engine cycles due to the extreme thermomechanical loading near the nozzle throat. In order to obtain an accurate lifetime prediction and to increase the lifetime, a detailed understanding of the thermomechanical behavior and the acting loads is indispensable. The first part is devoted to a thermally coupled simulation (conjugate heat transfer) of a fatigue experiment. The simulation contains a thermal FEM model of the fatigue specimen structure, RANS simulations of nine cooling channel flows and a Flamelet-based RANS simulation of the hot gas flow. A pseudo-transient, implicit Dirichlet–Neumann scheme is utilized for the partitioned coupling. A comparison with the experiment shows a good agreement between the nodal temperatures and their corresponding thermocouple measurements. The second part consists of the lifetime prediction of the fatigue experiment utilizing a sequentially coupled thermomechanical analysis scheme. First, a transient thermal analysis is carried out to obtain the temperature field within the fatigue specimen. Afterwards, the computed temperature serves as input for a series of quasi-static mechanical analyses, in which a viscoplastic damage model is utilized. The evolution and progression of the damage variable within the regions of interest are thoroughly discussed. A comparison between simulation and experiment shows that the results are in good agreement. The crucial failure mode (doghouse effect) is captured very well.

show abstract

Experimental and numerical investigations of thermo-mechanical fluid-structure interaction in cooled rocket combustion chambers

Cited by 2 publications

References 5 publications

Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct

Lifetime Experiments of Regeneratively Cooled Rocket Combustion Chambers and PIV Measurements in a High Aspect Ratio Cooling Duct

Pseudo-transient 3D Conjugate Heat Transfer Simulation and Lifetime Prediction of a Rocket Combustion Chamber

Contact Info

Product

Resources

About