Results 31 to 40 of about 11,681 (284)

Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen

Aerospace, 2022
This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi, Kenya Harada, Hiroaki Kobayashi, Motoyuki Hongoh, Daisaku Masaki, Shunsuke Nishida   +5 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Acoustic transmission and reflection by a shear discontinuity separating hot and cold regions [PDF]

, 1972
Acoustic transmission and reflection is analyzed for plane waves propagating from a hot moving medium, impinging on a plane shear discontinuity into a cold stationary region.
Candel, S. M.
core   +1 more source

Deep Reinforcement Learning‐Based Control for Real‐Time Hybrid Simulation of Civil Structures

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Real‐time Hybrid Simulation (RTHS) is a cyber‐physical technique that studies the dynamic behavior of a system by combining physical and numerical components that are coupled through a boundary condition enforcer. In structural engineering, the numerical components are subjected to environmental loads that become dynamic displacements of the ...
Andrés Felipe Niño, Alejandro Palacio‐Betancur, Piedad Miranda‐Chiquito, Juan David Amaya, Christian E. Silva, Mariantonieta Gutierrez Soto, Luis Felipe Giraldo   +6 more
wiley   +1 more source

Resource reallocation across successive systemic innovations: How Rolls‐Royce shaped the evolution of the turbojet, turboprop, and turbofan

Strategic Management Journal, EarlyView.
Abstract Research Summary Despite the importance of resource reallocation in shaping a variety of strategic outcomes, strategy scholars have paid only limited attention to the processes by which firms reallocate their resources across successive systemic innovations.
Gino Cattani, Mariano Mastrogiorgio, Giuseppe Carignani   +2 more
wiley   +1 more source

Identification of Missing Knowledge in MBSE System Models Using Graph‐Based Machine Learning

Systems Engineering, EarlyView.
ABSTRACT The design and development of complex aerospace systems pose significant challenges due to their growing complexity. Iterative design processes, guided by formal specifications, strive to refine initially vague characteristics through multiple stages.
Esma Karagoz, Olivia J. Pinon Fischer, Dimitri Mavris   +2 more
wiley   +1 more source

Analysis of temperature distribution in the annular mixing chamber of a gas turbine engine

Авіаційно-космічна техніка та технологія
The object of this research was the mixing chamber of a turbofan engine. The subject of this study was the thermogasdynamic processes in the mixing chamber of the turbojet engine before the turbine of the turbofan stage.
Illia Yudin
doaj   +1 more source

A Visualization Verification Method for Startup Risk of Substation Equipment Based on Multidimensional Graph Models

Engineering Reports, Volume 7, Issue 11, November 2025.
Based on a multi‐dimensional diagram model, a technique for visual verification of the risk of starting substation equipment is studied. This method can effectively and precisely verify the possible risks during the substation equipment startup and enhance the power system's operational safety.
Lifan Mao, Huang Chen, Yongqi He, Chuanpu Zhu, Chao Chen   +4 more
wiley   +1 more source

Adaptive Neuro‐Fuzzy Inference System‐Based Sliding Mode Control in the Presence of External Disturbances and Parameter Variation for Quadcopter UAV

Engineering Reports, Volume 7, Issue 10, October 2025.
The helical trajectory of a quadcopter is a three‐dimensional path in the presence of disturbance. ABSTRACT Quadrotor unmanned aerial vehicles (UAVs) are increasingly becoming essential tools in applications such as surveillance, military operations, crop monitoring, search and rescue, and inspection of hazardous terrain.
Daniel Fikadu Assefa, Elisabeth Andarge Gedefaw, Chala Merga Abdissa, Lebsework Negash Lemma   +3 more
wiley   +1 more source

Various Methods of Encapsulation Biomaterials in Self‐Healing Concrete: A Review

Engineering Reports, Volume 7, Issue 9, September 2025.
Investigation of the different methods of encapsulation of healing materials. ABSTRACT Concrete is known for its inherent vulnerability to cracking, which can be attributed to factors like temperature fluctuations, changes in moisture levels, and cyclic loading.
Mostafa Adresi, Mehdi Khoshoo
wiley   +1 more source