Results 51 to 60 of about 678 (224)

An Experimental Study of the Relative Sensitivity to Oxidative Aging of NaBH4‐promoted Green Hypergolic Fuels

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 1, Page 97-107, January 2026.
ABSTRACT Conventional hypergolic propellants cause technical problems due to their toxicity and carcinogenic properties, which increase development costs and lead to significant environmental issues. These challenges can be addressed by incorporating additives with low‐toxicity fuels to render them hypergolic.
Kyounghwan Lee, Chungman Kim, Hongjae Kang, Youngchul Park, Jongkwang Lee   +4 more
wiley   +1 more source

The beneficial effect of agglomerations of inclusions on the fracture toughness of ceramic nanocomposites

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Agglomerations of carbon‐based inclusions and the low adhesion of inclusion‐matrix interfaces are commonly viewed as detrimental to the strength and fracture toughness of ceramic composites. While large, high‐power agglomerations indeed promote microcracking, our computations show that moderate agglomeration levels can enhance energy ...
Elijah N. Borodin, Alexander G. Sheinerman, Mikhail Yu. Gutkin, Andrey P. Jivkov   +3 more
wiley   +1 more source

Statement of the problem of designing a liquid rocket engine dual bell nozzle of the maximum thrust using the direct method of the calculus of variations

Challenges and Issues of Modern Science, 2023
A rocket engine with a standard single-section profiled nozzle provides maximum thrust only at a certain value of atmospheric pressure [1]. To expand the range of atmospheric pressure values at which the optimum engine operation mode is achieved, a dual
Ivan Dubrovskyi, Valerii Bucharskyi
doaj  

A unified thermo‐chemo‐mechanical model for passive, active, and interfacial oxidation of silicon carbide

Journal of the American Ceramic Society, Volume 109, Issue 1, January 2026.
Abstract Silicon carbide (SiC) is a promising material for hypersonic thermal protection systems, but its complex oxidation behavior—marked by transitions between passive, active, and interfacial bubbling regimes—can lead to catastrophic failure. Existing SiC models typically focus exclusively on either passive or active oxidation.
Théo A. Rulko, Raúl A. Radovitzky
wiley   +1 more source

Thermal–Structural Assessment of a Convergent Nozzle for UAV Applications Using Advanced Steady‐State Thermal Analysis

Journal of Engineering, Volume 2026, Issue 1, 2026.
This study presents an in‐depth structural evaluation of the convergent nozzle in a microgas turbine engine (MGTE), focusing on the performance of various lightweight materials used in aerospace applications. The research investigates both structural and aerothermal characteristics of the nozzle under realistic operating conditions.
Darshan Kumar Jayaram, Gopinath Vinayagam, Beena Stanislaus Arputharaj, Vijayanandh Raja, Arpan Hazra   +4 more
wiley   +1 more source

Numerical simulation of gas dynamics during operation of a wide-range rocket nozzle with a porous insert

Научно-технический вестник информационных технологий, механики и оптики
When the rocket moves in the dense layers of the Earth’s atmosphere, classical nozzles operate in the jet overexpansion mode. In this mode, there is a partial decrease in the magnitude of the specifc impulse.
M. V. Mikhailov, N. V. Prodan, M. E. Renev   +2 more
doaj   +1 more source

Three-Dimensional Numerical Analysis of LOX/Kerosene Engine Exhaust Plume Flow Field Characteristics

International Journal of Aerospace Engineering, 2017
Aiming at calculating and studying the flow field characteristics of engine exhaust plume and comparative analyzing the effects of different chemical reaction mechanisms on the engine exhaust plume flow field characteristics, a method considering fully ...
Hong-hua Cai, Wan-sheng Nie, Xin-lei Yang, Rui Wu, Ling-yu Su   +4 more
doaj   +1 more source

A Computational Study of MHD Radiative Viscoelastic Nanofluid Over a Stretching Sheet With Thermophoresis and Chemical Reaction

Engineering Reports, Volume 7, Issue 12, December 2025.
A computational model for analyzing heat and mass transfer in MHD viscoelastic nanofluid flow with Brownian motion, thermal radiation and chemical reaction are developed in this work. The findings demonstrate how flow stability, heat transfer, and solute distribution are impacted by these significant physical effects.
Tazin Tamanna, Sarder Firoz Ahmmed
wiley   +1 more source

Exposure to the Role of Primary Breakup Parameters of an Effervescent Atomizer Using High‐Speed Flow Visualization Techniques

Energy Science &Engineering, Volume 13, Issue 12, Page 5988-6002, December 2025.
Instabilities and Atomization Dynamics of Effervescent Liquid Sheets. ABSTRACT The study experimentally investigates the primary disintegration of a liquid sheet in an inside‐out effervescent atomizer using high‐speed flow visualization, focusing on the effects of bubbly flow.
S. Karthick, K. Balaji, R. Sakthivel, A. K. Indrajith, P. V. Elumalai, Avinash Kumar, Dhinesh Balasubramanian, Yasser Fouad, Manzoore Elahi M. Soudagar, Nasim Hasan   +9 more
wiley   +1 more source

Emerging Trends in Additive Manufacturing of Metal Matrix Composites: Opportunities and Obstacles

MetalMat, Volume 2, Issue 4, December 2025.
Schematic illustrating the limitations of conventional MMC manufacturing and AM‐based solutions for high‐performance engineering applications. ABSTRACT Metal matrix composites (MMCs) are attracting increasing attention owing to their high strength, thermal stability, and wear resistance, making them essential in industries such as aerospace, automotive,
Juyeon Han, Hyokyung Sung, Jae Bok Seol, Kisub Cho, YeonJoo Lee, Hyunjoo Choi   +5 more
wiley   +1 more source