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International Journal of Energetic Materials and Chemical Propulsion

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ISSN Print: 2150-766X

ISSN Online: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

FLOW VISUALIZATIONS WITH BACKGROUND-ORIENTED SCHLIEREN IN A TRANSPIRATION-COOLED MODEL SCRAMJET COMBUSTOR

Volume 18, Issue 2, 2019, pp. 133-155
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2019028003
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ABSTRACT

The Institute of Space Propulsion of the German Aerospace Center (DLR) has developed and set up a research test bench to investigate the applicability of transpiration cooling systems to scram-jets and to examine the resulting phenomena in the supersonic flow. It consists of a chemical hydrogen/oxygen air vitiator with attached Scramjet model combustion chamber with an optional half-wedge-shaped shock generator. The used porous media consists of high-temperature resistant stainless steel and Inconel with different porosities. Gaseous nitrogen and gaseous hydrogen were used as coolant with different pre-pressures. Optical access allows the use of a schlieren system and background-oriented schlieren (BOS) for flow investigations. Phenomena such as hot spots on the porous wall, inefficient cooling, and shock-boundary-layer interaction (SBLI) were observed in the experiments. With the BOS system, thickening of the boundary layer/boundary layer separation was demonstrated. Furthermore, the development of shock trains forced by the introduction of a secondary coolant flow can be illustrated, leading to an increased physical blockage up to the choking case. This publication summarizes the SBLI results gained by application of BOS setup and compares them with results obtained by the help of a classic schlieren setup. BOS emerged in the experiments to be less affected by changes in the refractive index of the quartz glass windows due to strong heating compared to the classic schlieren method. Challenges in optimizing the BOS systems' performance and subsequent changes in the test setup are discussed.

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CITED BY
  1. Strauss Friedolin T., General Stephan, Manfletti Chiara, Schlechtriem Stefan, Flow Path and Interaction Analysis in a Hydrogen Transpiration Cooled Scramjet Model Combustor, AIAA Propulsion and Energy 2019 Forum, 2019. Crossref

  2. Strauss Friedolin T., General Stephan, Cragg Patrick A., Schlechtriem Stefan, Wall Pressure Effects and Shock-Boundary Layer Interactions in a Transpiration Cooled Scramjet Model Combustor, 23rd AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2020. Crossref

  3. Strauss Friedolin T., General Stephan, Cragg Patrick A., Schlechtriem Stefan, Lateral Wall Pressure Effects in a Transpiration Cooled Scramjet Model Combustor with Shock-Boundary Layer Interaction, AIAA Propulsion and Energy 2020 Forum, 2020. Crossref

  4. Strauss Friedolin T., General Stephan, Cragg Patrick A., Manassis Konstantin, Schlechtriem Stefan, Lateral Wall Temperature Effects in a Transpiration Cooled Scramjet Model Combustor with Shock-Boundary Layer Interaction, AIAA Propulsion and Energy 2021 Forum, 2021. Crossref

  5. Tomaschek Fabian, Arnold Denis, Sering Konstantin, Strauss Friedolin, A corpus of Schlieren photography of speech production: potential methodology to study aerodynamics of labial, nasal and vocalic processes, Language Resources and Evaluation, 55, 4, 2021. Crossref

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