Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title]最新文献

Lifting Entry Analysis for Manned Mars Exploration Missions 载人火星探测任务升力进入分析

Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title] Pub Date : 2022-01-16 DOI: 10.5772/intechopen.101993

A. Aprovitola, Fabrizio Medugno, G. Pezzella, L. Iuspa, A. Viviani

引用次数: 0

Aero Heating Optimization of a Hypersonic Thermochemical Non-Equilibrium Flow around Blunt Body by Application of Opposing Jet and Blunt Spike 应用反向射流和钝突的高超声速绕钝体热化学非平衡流航空加热优化

Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title] Pub Date : 2022-01-12 DOI: 10.5772/intechopen.101659

R. Renane, R. Allouche, Oumaima Zmit, Bouchra Bouchama

{"title":"Aero Heating Optimization of a Hypersonic Thermochemical Non-Equilibrium Flow around Blunt Body by Application of Opposing Jet and Blunt Spike","authors":"R. Renane, R. Allouche, Oumaima Zmit, Bouchra Bouchama","doi":"10.5772/intechopen.101659","DOIUrl":"https://doi.org/10.5772/intechopen.101659","url":null,"abstract":"The goal of this work is to give optimum aerothermal solutions for thermal protection of the nose wall of space shuttles during atmospheric reentry, where the air flow is hypersonic, nonequilibrium reactive flow (vibrational and chemical) behind detached shock waves, it’s governed by Navier–Stokes equations with chemical reaction source terms, and modelled using five species (N2, O2, NO, N, O) and Zeldovich chemical scheme with five reactions. This study which simulates the flow using the software Fluent v.19 focuses on the comparison between three protection techniques based on the repulsion of the shock wave, the first is geometric, it consists in introducing a spike that makes the right shock move away from the nose of the shuttle, this allows the endothermic physicochemical processes of dissociation and ionization to absorb heat, the second technique is based on an opposite jet configuration in the frontal region of the nose, this jet allows to push the strong shock, and consequently reduce the heat released, the last technique is the assembly of the two previous techniques; Jets nearby the spike noses were set up in front of the blunt body to reconfigure the flow field and reduce aerodynamic overheating. The opposing jet model reduces the heat at the nose by 12.08% compared to the spike model and by 20.36% compared to the spike jet model. The flow field reconfiguration was the most important factor in heat reduction, according to the quantitative analysis, a combination parameter was given as the main criterion for designing spiked bodies with opposing jets for the goal of heat reduction based on the locations of the reattached shock and its interaction with the conical shock. The results obtained are in good agreement with the specialized literature.","PeriodicalId":348208,"journal":{"name":"Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title]","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114274758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Hypersonic Conic Flows Generated by Magnetoplasma Light-Gas Gun Equipped With Laval Nozzle 配备拉瓦尔喷嘴的磁等离子体光气枪高超声速二次流研究

Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title] Pub Date : 2021-12-10 DOI: 10.5772/intechopen.99457

Pavel P. Khramtsov

引用次数: 0

Experimental Analysis of Waverider Lift-to-Drag Ratio Measurements in Rarefied and Supersonic Regime 稀薄和超音速条件下乘波器升阻比测量的实验分析

Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title] Pub Date : 2021-10-06 DOI: 10.5772/intechopen.100328

Noubel Hugo, V. Lago

{"title":"Experimental Analysis of Waverider Lift-to-Drag Ratio Measurements in Rarefied and Supersonic Regime","authors":"Noubel Hugo, V. Lago","doi":"10.5772/intechopen.100328","DOIUrl":"https://doi.org/10.5772/intechopen.100328","url":null,"abstract":"This work, performed in the MARHY rarefied hypersonic facility, experimentally explores the effects of rarefaction on a classical waverider geometry. This hypersonic vehicle is designed to develop a shock attached along the leading edge length to improve flight efficiency. The concept was first proposed by Nonweiler in 1959. Since then, many studies have been conducted, mainly on numerical aspects. Few works have included the influence of the viscous effect, we can cite those of Bowcutt who showed how viscous effects impact the optimal shapes due to the skin friction drag. However, the trajectories of these types of vehicles anticipate flights with high Mach numbers and at high altitudes where rarefaction effects can strongly impact the lift-to-drag ratio predictions. This work focuses on the behavior of the L/D ratio at different supersonic operating conditions. The viscous effects were analyzed with 4 operating flow conditions: Mach 2 and 8 Pa static pressure and Mach 4 with 2, 8 and 71 Pa static pressures. For this purpose, the aerodynamic coefficients were measured for several angles of incidence. with a homemade sting balance. The experimental results were compared to Monte Carlo numerical simulations performed with the DS3V code.","PeriodicalId":348208,"journal":{"name":"Hypersonic Vehicles - Applications, Recent Advances, and Perspectives [Working Title]","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2