Results 11 to 20 of about 151,810 (262)
Transient spray combustion characteristics in a gas–liquid pintle rocket engine under acoustic excitation [PDF]
Scientific ReportsIn order to investigate the acoustic oscillation characteristics of gas–liquid pintle rocket engines and elucidate the path by which spray combustion process provides energy to the combustor pressure oscillation, a LOX/GCH4 pintle engine with rectangular
Xuan Jin +3 more
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Improvement of Z-Weighted Function Based on Fifth-Order Nonlinear Multi-Order Weighted Method for Shock Capturing of Hyperbolic Conservation Laws [PDF]
EntropyBased on a 5-point stencil and three 3-point stencils, a nonlinear multi-order weighted method adaptive to 5-3-3-3 stencils for shock capturing is presented in this paper.
Jinwei Bai +4 more
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Aerospace, 2022 Hypersonic vehicles are drawing more and more attention now and for the near future, especially in the low-altitudes near space, from 20 km to 45 km.
Pengcheng Cui +7 more
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Unsteady Flow Driven by the Counter-Flow Jets of High-Altitude Engine Based on DSMC Simulation
气体物理, 2023 Counter-flow engines are often used for aircraft slowing or separating. In order to study the interaction between the counter-flow jets and free stream at high altitudes, the rarefied flow driven by two counter-flow jets and hypersonic free stream was ...
Jun-lin WU +4 more
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Development of Transonic Unsteady Aerodynamic Reduced-Order Models Using System Identification Techniques [PDF]
Carloni, A. C. N. and Azevedo, J. L. F., "Development of Transonic
Unsteady Aerodynamic Reduced-Order Models Using System Identification
Techniques". Paper No. ENC-2022-0192, 19th ENCIT Congress. Nov. 2022, 2023 The present paper develops a reduced-order model capable of modeling unsteady aerodynamic loads in the transonic regime using system identification techniques. The computational fluid dynamics (CFD) calculations are based on the Euler equations and the code uses a finite volume formulation for general unstructured grids.
arxiv +1 more source
气体物理, 2023 It is important to study the effects of pyrolysis and ablation of heat protection material in integrated design of hypersonic vehicles. In order to predict and assess the material pyrolysis and ablation effects on target signatures and microwave ...
Tie-suo GAO +5 more
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NeuroBEM: Hybrid Aerodynamic Quadrotor Model [PDF]
Robotics: Science and Systems (RSS), 2021, 2021 Quadrotors are extremely agile, so much in fact, that classic first-principle-models come to their limits. Aerodynamic effects, while insignificant at low speeds, become the dominant model defect during high speeds or agile maneuvers. Accurate modeling is needed to design robust high-performance control systems and enable flying close to the platform ...
arxiv +1 more source
Effect of gas blowing on the head of thermal ablation vehicle
Advances in Aerodynamics, 2022 The reentry vehicle will encounter thermal ablation, especially at the stagnation point regime. A theoretical work has been done to analyze the thermal effect of gas blowing due to thermal ablation of surface material on the head of a general hypersonic ...
Qing Li +3 more
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Research on Variable-Step-Size Adaptive Filter Algorithm with a Momentum Term
Applied Sciences, 2023 To address the contradiction between the convergence error and convergence rate in the LMS algorithm, this study proposes a variable-step-size adaptive filter algorithm with a momentum term based on the logistic function.
Binbin Li +7 more
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Hypersonic aerodynamic force balance using temperature compensated semiconductor strain gauges
Advances in Aerodynamics, 2023 Metal foil strain gauges remain the state-of-the-art transducers for wind tunnel balances. While strain gauge technology is very mature, piezoresistive semiconductor sensors offer alternatives that are worth exploring to assess their unique benefits ...
Huacheng Qiu +5 more
doaj +1 more source