Results 11 to 20 of about 6,709 (233)
Experimental Investigation on Ablative Characteristics of EPDM Insulation in SRJ Combustion Chamber
International Journal of Aerospace EngineeringThe ablative characteristics of the insulation in the combustion chamber are an essential part of the research on solid rocket ramjet thermal protection. However, the research on ablative characteristics under long working times is quite limited. In this
Wenxiang Cai, Weimin Huang, Weixuan Li
doaj +2 more sources
Historical and current usage of per‐ and polyfluoroalkyl substances (PFAS): A literature review
American Journal of Industrial Medicine, Volume 66, Issue 5, Page 353-378, May 2023., 2023 Abstract Background Per‐ and polyfluoroalkyl substances (PFAS) have uniquely useful chemical and physical properties, leading to their extensive industrial, commercial, and consumer applications since at least the 1950s. Some industries have publicly reported at least some degree of information regarding their PFAS use, while other industries have ...
Linda G. T. Gaines
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Closed‐Loop Fault Diagnosis of SDR Using Gap Metric, PCA, and Kalman’s Principle
International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 2023 The measurement of the pressure in the gas generator (GG) plays a decisive role in the closed‐loop regulation of the gas flow in a solid ducted rocket ramjet (SDR). Therefore, the fault detection and isolation (FDI) of the pressure sensors is particularly significant.
Hongfu Wang +5 more
wiley +1 more source
Energy Science &Engineering, Volume 10, Issue 10, Page 3839-3853, October 2022., 2022 To study the effects of the ratio of air injection pressure to hydrogen injection pressure (pR = pA/pH) on the propagation characteristics of rotating detonation waves (RDWs) and the working range of continuous rotating detonation engines (CRDEs), experiments were conducted under different injection pressure ratios and air mass flow rates with hydrogen
Minxuan Wu +6 more
wiley +1 more source
Analysis of flow-field in a dual mode ramjet combustor with boundary layer bleed in isolator
Propulsion and Power Research, 2021 A two-dimensional Reynolds averaged Navier Stokes (RANS) simulation of a dual mode ramjet (DMRJ) combustor is performed, modeling the University of Michigan dual-mode combustor experimental setup operating in reacting mode with different equivalence ...
Nishanth Thillai +3 more
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ADN Solid Propellants with High Burning Rates as Booster Material for Hypersonic Applications
Propellants, Explosives, Pyrotechnics, Volume 47, Issue 7, July 2022., 2022 Abstract RAM‐ and SCRAM‐Jet engines can not generate static thrust and only work at high speeds. This starting velocity of the motor v0 is usually generated by carrier rockets or boosters, which mostly use solid propellants based on ammonium perchlorate (AP) and hydroxyl‐terminated polybutadiene (HTPB).
Stefan Sims +2 more
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Hybrid Modeling Method of SDR Interstage Valve Based on Mechanism and Data‐Driven
International Journal of Aerospace Engineering, Volume 2022, Issue 1, 2022., 2022 Variable‐throat adjustment is the most practical flow regulation method of solid ducted rocket ramjet (SDR). The high‐fidelity mathematical model of the interstage valve is the basis for realizing high‐precision gas flow and thrust regulation. In this paper, the complex effect of gas was divided into load and throat deformation effect.
Hongfu Wang +5 more
wiley +1 more source
Ramjet Compression System for a Hypersonic Air Transportation Vehicle Combined Cycle Engine
Energies, 2018 This report assesses the performance characteristics of a ramjet compression system in the application of a hypersonic vehicle. The vehicle is required to be self-powered and perform a complete flight profile using a combination of turbojet, ramjet and ...
Sasha Veeran +2 more
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Application of Gap Metric to LADRC Design in Multilinear Model of SDR
International Journal of Aerospace Engineering, Volume 2022, Issue 1, 2022., 2022 The solid ducted rocket ramjet (SDR) system faces many disturbances in the process of operation, and the linear active disturbance rejection controller (LADRC) has been widely used in engineering to solve such problems. However, the SDR also has strong nonlinearity, which brings a great challenge to the application of the LADRC in the gas flow ...
Hongfu Wang +4 more
wiley +1 more source
Comparative performance analysis of combined-cycle pulse detonation turbofan engines (PDTEs)
Propulsion and Power Research, 2013 Combined-cycle pulse detonation engines are promising contenders for hypersonic propulsion systems. In the present study, design and propulsive performance analysis of combined-cycle pulse detonation turbofan engines (PDTEs) is presented.
Sudip Bhattrai, Hao Tang
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