Results 41 to 50 of about 20,111 (287)
Deep Underground Science and Engineering, EarlyView.This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh +12 more
wiley +1 more source
Image analysis for velocity profile estimation in A-SOFT hybrid rocket combustor
Journal of Fluid Science and Technology, 2018 Altering-intensity Swirling-Oxidizer-Flow-Type (A-SOFT) hybrid rocket engine (HRE) was proposed as a technique to solve problems of current hybrid rockets.
Nobuhiro KIMURA +3 more
doaj +1 more source
Aerospace, 2023 Hybrid rockets are safe and inexpensive; however, boundary-layer combustion poses a problem in achieving a fuel regression rate equivalent to that of solid propellants.
Tsuyoshi Oishi +2 more
doaj +1 more source
Energy Science &Engineering, EarlyView.This research explores how fluid flow, structural movement, and sound interact in an elastic baffle system. Using a numerical approach based on the finite element method, the study analyzes how noise and vibrations change with different baffle configurations. The findings reveal that shortening the baffle by half reduces noise transmission by 9%, while
Tohid Adibi +5 more
wiley +1 more source
Review of Classical Diffusion-Limited Regression Rate Models in Hybrid Rockets
Aerospace, 2019 In this article, we undertake a concise review of several milestone developments in classical regression rate models of hybrid rocket motors. After a brief description of the physical processes entailed in hybrid rocket combustion, Marxman’s ...
Timothy Marquardt, Joseph Majdalani
doaj +1 more source
Genetic Algorithm Optimization of a Cost Competitive Hybrid Rocket Booster [PDF]
Performance, reliability and cost have always been drivers in the rocket business. Hybrid rockets have been late entries into the launch business due to substantial early development work on liquid rockets and solid rockets.
Story, George
core +4 more sources
Experimental Study on the Mass Flow Rate of the Self-Pressurizing Propellants in the Rocket Injector
Aerospace, 2021 High vapor pressure propellants such as nitrous oxide are widely used in experimental hybrid and liquid rockets as they can be used in a self-pressurization mode, eliminating the need for external pressurization or pumps and simplifying the design of the
Tomasz Palacz, Jacek Cieślik
doaj +1 more source
Solar Sailing: applications and technology advancement [PDF]
, 2011 Harnessing the power of the Sun to propel a spacecraft may appear somewhat ambitious and the observation that light exerts a force contradicts everyday experiences.
Macdonald, Malcolm
core +2 more sources
Special Issue “Hybrid Rocket (Volume II)”
Aerospace, 2022 Over the past 40 years, the loss rate for commercial passenger aircrafts has decreased down to about one in ten million, whereas the loss rate for spaceflight has remained high, in the 1% range [...]
Toru Shimada +2 more
openaire +4 more sources
Technology Development Outsourcing: When to Join Forces With a Rival?
Journal of Operations Management, EarlyView.ABSTRACT Knowing the challenges of collaborating with a competitor in developing new technologies, firms sometimes still choose a competitor instead of a noncompeting technology provider. To explore why, this study adopts an inter‐organizational trust view to explain the formation of a technology development outsourcing relationship.
Tingting Yan, Hubert Pun, Dina Ribbink
wiley +1 more source