Redesign of the Vulcain 2 Nozzle Extension

Winterfeldt, Lars; Laumert, Björn; Tano, Robert; James, Philippe; Geneau, F.; Hagemann, G.

doi:10.2514/6.2005-4536

Cited by 29 publications

(12 citation statements)

References 1 publication

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“…CuCrNb [21]), recently applied material production technologies (e.g. vacuum plasma spraying [22]) and/or recently applied thermal barrier coatings [23] with respect to the cyclic thermo-mechanical fatigue of these wall structures, materials and/or coatings. Furthermore, additionally to the fatigue life analysis methods discussed in this paper, test results can also be used for the validation of CFD analyses as listed in Table 1 and Table 2.…”

Section: B Tmf Testsmentioning

confidence: 99%

Comparison of Finite Element analysis and experimental results of a combustion chamber type TMF panel test

Riccius

Bouajila

Zametaev

2013

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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The inner liner of a regeneratively cooled wall of a main stage rocket combustion chamber is extremely loaded by the high temperature of the hot gas and the pressure difference between the coolant and the hot gas. A cyclic operation of such a chamber usually causes a LFC failure of the wall structure after a very low number of cycles. For the tests presented in this paper, cyclic laser heating is (as replacement for the hot gas) applied to an actively cooled small section of the hot gas wall of the real engine -the so called TMF panel.Optical measurements during such TMF panel tests provide essential validation data for CFD, thermal, structural and fatigue life analyses: The 2d measurement of the thermal field of the heat loaded structure provides -together with the measurement of the temperature, pressure and mass flow rate of the coolant of the TMF panel -data for the combined validation of the CFD analysis of the coolant flow and the thermal analysis of the wall structure. The measurement of the deformation of the thermally loaded structure providestogether with the already determined temperature distribution and the above mentioned pressure measurements of the cooling channels -data for the validation of the structural analysis of the thermally loaded structure. Counting the number of laser loading cycles (laser on-off) until the TMF panel fails (by cracks appearing on the laser loaded side of the cooling channels) provides data for the validation of (either post processing or damage parameter based) fatigue life analyses of thermally loaded structures.

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Section: B Tmf Testsmentioning

confidence: 99%

Comparison of Finite Element analysis and experimental results of a combustion chamber type TMF panel test

Riccius

Bouajila

Zametaev

2013

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

View full text Add to dashboard Cite

show abstract

“…CuCrNb 20 ), recently applied material production technologies (e.g. vacuum plasma spraying 21 ) and/or recently applied thermal barrier coatings 22 with respect to the cyclic thermomechanical fatigue of these wall structures, materials and/or coatings.…”

Section: Discussionmentioning

confidence: 99%

TMF tests: Optical heating, thermography and deformation measurement of combustion chamber wall structures

Riccius¹,

Gernoth²,

Schlechtriem³

2011

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Optical measurement possibilities for actively cooled thermally loaded wall structures of rocket engines by means of Thermo-Mechanical Fatigue (TMF) tests -aiming at the creation of validation data for CFD, thermal, structural and life time analyses are discussed in this paper. During a TMF test, only a small section of the hot gas wall of the real engine (the so called TMF panel) is tested. For such a TMF panel, realistic cooling conditions similar to a full scale rocket engine are chosen. The 2d measurement of the thermal field of the heat loaded structure provides (together with the measurement of the temperature, pressure and mass flow rate of the coolant of the TMF panel) data for the combined validation of the CFD analysis of the coolant flow and the thermal analysis of the wall structure. The measurement of the deformation of the thermally loaded structure provides (together with the already determined temperature distribution and the above mentioned pressure measurements of the cooling channels) data for the validation of the structural analysis of the thermally loaded structure. Counting the number of laser loading cycles (laser on-off) until the TMF panel fails (by cracks appearing on the laser loaded side of the cooling channels) provides data for the validation of (either post processing or damage parameter based) life time analyses of thermally loaded structures.

show abstract

“…CuCrNb [23]), recently applied material production technologies (e.g. vacuum plasma spraying [24]) and/or recently applied thermal barrier coatings [25] with respect to the cyclic thermo-mechanical fatigue of these wall structures, materials and/or coatings.…”

Section: Discussionmentioning

confidence: 99%

Inner liner temperature variation caused deformation localisation effects in a multichannel model of a generic LRE wall structure

Riccius¹,

Zametaev²,

Bouajila³

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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The inner liner of a regeneratively cooled wall of a main stage rocket combustion chamber is extremely loaded by the high temperature of the hot gas and the pressure difference between the coolant and the hot gas. A cyclic operation of such a chamber usually causes a LFC failure of the wall structure after a very low number of cycles. The development and flight qualification of such components includes on top of many other actions thermal, structural and fatigue life analyses of chamber wall structures. Often, these analyses are based on half cooling channel + half fin Finite Element models of a tiny chamber wall section with symmetry conditions at the centerline of the cooling channel and the centerline of the fin. However, injector vicinity caused chamber wall temperature variations in circumferential direction of the chamber wall may cause localization effects of the deformation of the inner liner of chamber wall structures. Exemplary, an injector vicinity caused 20 K wall temperature variation is taken into account by a three-channel model. The influence of this variation to the distribution of the circumferential strain distribution as well as to the post processing determined fatigue life is shown.

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Redesign of the Vulcain 2 Nozzle Extension

Cited by 29 publications

References 1 publication

Comparison of Finite Element analysis and experimental results of a combustion chamber type TMF panel test

Comparison of Finite Element analysis and experimental results of a combustion chamber type TMF panel test

TMF tests: Optical heating, thermography and deformation measurement of combustion chamber wall structures

Inner liner temperature variation caused deformation localisation effects in a multichannel model of a generic LRE wall structure

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