Modeling and Validation on Thermal Cracking Reaction of a Liquid Hydrocarbon Fuel under Supercritical State
| Autor: | ISONO, Tatsushi, MIYAURA, Takuto, DAIMON, Yu, ONODERA, Takuo, TOMIOKA, Sadatake |
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| Jazyk: | japonština |
| Rok vydání: | 2023 |
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| Zdroj: | 令和4年度宇宙輸送シンポジウム: 講演集録 = Proceedings of Space Transportation Symposium FY2022. |
| Popis: | 令和4年度宇宙輸送シンポジウム（2023年1月12日-13日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)) , 相模原市, 神奈川県 Space Transportation Symposium FY2022 (January 12-13, 2023. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan Space transportation with air-breathing engine like scramjet has a potential to drastically improve the specific impulse, compared with conventional rocket engine. Since this type of engine is exposed to severe thermal load under operation, the thermal protection is one of the biggest technical issues for practical application. We have proposed applying regenerative cooling to the engine system. In the present study, to establish the prediction method for endothermic performance of the liquid hydrocarbon fuel brought by thermal cracking, the thermal cracking reaction of the liquid hydrocarbon was numerically modeled and experimentally validated. We adopted the n-dodecane as the test fuel, which is the surrogate of the jet fuel Jet A-1 for academical use. The validation test had been conducted using our developed fuel heating test facility, to obtain the component ratio of the thermal cracking product. To reproduce the validation test result, the thermal cracking reaction of the n-dodecane was numerically modeled by modifying and integrating the existing models. Newly constructed model partially predicted the component ratio with sufficient accuracy, while did not reproduce some of the components. To specify the major error factor, the simulation was repeated while varying the reaction temperature. As a result, we found that the simulation should consider temperature and velocity distributions, for more improvement of the prediction accuracy. In other words, the present study demonstrated the necessity to expand the dimensionality of the simulation model from the present 0 to 2 or 3. 資料番号: SA6000184037 STCP-2022-037 |
| Databáze: | OpenAIRE |
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