{"title":"利用CFD研究高超声速再入飞行器中尖峰的最新进展","authors":"E. Madhukar, Harish Panjagala","doi":"10.1115/IMECE2018-86550","DOIUrl":null,"url":null,"abstract":"The recent introduction of spike in the frontal region of high speed reentry vehicles has brought a tremendous improvement in space activities in the world. The major issue that the spikes resolves is aero heating of re-entry vehicles. Moreover, it preserves structural integrity and avoids damage. Usage of spike is economical and effective over different kinds of thermal protection system. Previous investigation on spiked re-entry vehicles leads to a conclusion that the Blunt and Snap spikes resulted in better reduction of temperature at nose of re-entry vehicle. This paper deals with geometry optimization of blunt and snap spike specifically the length, which is varied as L/8, L/4 and 3L/8 respectively where L is the length of the vehicle. ANSYS 17.2 FLUENT solver is incorporated for analysis purpose and the results are compared among the three different length spike re-entry vehicles. Modal analysis has also been carried out and natural frequency of spikes are obtained. This would provide a way to accept the safe and economical design with better thermal protection of the high-speed space vehicle.","PeriodicalId":119220,"journal":{"name":"Volume 1: Advances in Aerospace Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Recent Advancements in Spikes Used in Hypersonic Re-Entry Vehicles by Using CFD\",\"authors\":\"E. Madhukar, Harish Panjagala\",\"doi\":\"10.1115/IMECE2018-86550\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The recent introduction of spike in the frontal region of high speed reentry vehicles has brought a tremendous improvement in space activities in the world. The major issue that the spikes resolves is aero heating of re-entry vehicles. Moreover, it preserves structural integrity and avoids damage. Usage of spike is economical and effective over different kinds of thermal protection system. Previous investigation on spiked re-entry vehicles leads to a conclusion that the Blunt and Snap spikes resulted in better reduction of temperature at nose of re-entry vehicle. This paper deals with geometry optimization of blunt and snap spike specifically the length, which is varied as L/8, L/4 and 3L/8 respectively where L is the length of the vehicle. ANSYS 17.2 FLUENT solver is incorporated for analysis purpose and the results are compared among the three different length spike re-entry vehicles. Modal analysis has also been carried out and natural frequency of spikes are obtained. This would provide a way to accept the safe and economical design with better thermal protection of the high-speed space vehicle.\",\"PeriodicalId\":119220,\"journal\":{\"name\":\"Volume 1: Advances in Aerospace Technology\",\"volume\":\"4 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-11-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Volume 1: Advances in Aerospace Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1115/IMECE2018-86550\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Volume 1: Advances in Aerospace Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/IMECE2018-86550","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Recent Advancements in Spikes Used in Hypersonic Re-Entry Vehicles by Using CFD
The recent introduction of spike in the frontal region of high speed reentry vehicles has brought a tremendous improvement in space activities in the world. The major issue that the spikes resolves is aero heating of re-entry vehicles. Moreover, it preserves structural integrity and avoids damage. Usage of spike is economical and effective over different kinds of thermal protection system. Previous investigation on spiked re-entry vehicles leads to a conclusion that the Blunt and Snap spikes resulted in better reduction of temperature at nose of re-entry vehicle. This paper deals with geometry optimization of blunt and snap spike specifically the length, which is varied as L/8, L/4 and 3L/8 respectively where L is the length of the vehicle. ANSYS 17.2 FLUENT solver is incorporated for analysis purpose and the results are compared among the three different length spike re-entry vehicles. Modal analysis has also been carried out and natural frequency of spikes are obtained. This would provide a way to accept the safe and economical design with better thermal protection of the high-speed space vehicle.