Results 51 to 60 of about 13,320 (264)

Hypergolic droplet‒film interaction dynamics at high temperatures

Droplet, EarlyView.
The whole reaction process can be distinctly identified as three stages based on the corona size and the temperature temporal evolution. In the coalescence regime, T* maintains quasi‐stationary values during initial contact, corresponding to hydrodynamic coalescence process. Consequently, the first stage is defined as the inertia‐dominant stage. In the
Yuxin Song, Zuohua Huang, Chenglong Tang
wiley   +1 more source

Out‐of‐field neutron radiation from clinical proton, helium, carbon, and oxygen ion beams

Medical Physics, EarlyView.
Abstract Background In hadron therapy, out‐of‐field doses, which may in the long‐term cause secondary cancers, are mostly due to neutrons. Very recently, 4He and 16O beams have been added to protons and 12C ions for clinical therapy. Purpose The focus of this article is to compare secondary neutron doses produced by clinical protons, 4He, 12C, and 16O ...
Matteo Bolzonella, Marco Caresana, Andrea Cirillo, Josep M. Martí‐Climent, Evangelina Martínez‐Francés, Christina Mooshammer, Stefan Schmidt, Stephan Brons, Marco Silari, Christina Stengl, Liliana Stolarczyk, José Vedelago   +11 more
wiley   +1 more source

Dual-fuel, dual-mode rocket engine [PDF]

, 1989
The invention relates to a dual fuel, dual mode rocket engine designed to improve the performance of earth-to-orbit vehicles. For any vehicle that operates from the earth's surface to earth orbit, it is advantageous to use two different fuels during its ...
Martin, James A.
core   +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  

Experimental validation of Geant4 nuclear interaction models in dose calculations of therapeutic carbon ion beams

Medical Physics, EarlyView.
Abstract Background The choice of nuclear interaction models in Monte Carlo simulations affects the dose calculation accuracy for light ion beam therapy. Purpose This study aimed to evaluate the dose calculation accuracy and simulation time of three GATE‐RTiON/Geant4 physics lists for therapeutic carbon ion beams, assessing their suitability for ...
Yihan Jia, Martina Favaretto, Lisa Hartl, Markus Stock, Dietmar Georg, Loïc Grevillot, Andreas F. Resch   +6 more
wiley   +1 more source

The Adaptive Composite Block-Structured Grid Calculation of the Gas-Dynamic Characteristics of an Aircraft Moving in a Gas Environment

Mathematics, 2022
This paper considers the problem associated with the numerical simulation of the interaction between the cocurrent stream occurring near a monoblock moving in the gas medium and solid fuel combustion products flowing from a solid fuel rocket engine (SFRE)
Victor V. Kuzenov, Sergei V. Ryzhkov, Aleksey Yu. Varaksin   +2 more
doaj   +1 more source

Fluid Dynamics and Infrared Stealth of Marine IRS Devices: A Review

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Infrared suppression (IRS) devices for naval ships play a crucial role in reducing the infrared radiation signature of high‐temperature exhaust, thereby enhancing the survivability of ships against infrared‐guided weapons. This paper provides a comprehensive review of recent advancements in the design and optimization of IRS devices.
Yitao Zou, Zhenrong Liu, Xin Qiao, Yingying Jiang, Hong Shi, Yanlong Jiang   +5 more
wiley   +1 more source

Far Field Deposition Of Scoured Regolith Resulting From Lunar Landings [PDF]

, 2012
As a lunar lander approaches a dusty surface, the plume from the descent engine impinges on the ground, entraining loose regolith into a high velocity dust spray.
Goldstein, D. B., Morris, A. B., Trafton, L. M., Varghese, P. L.   +3 more
core   +1 more source

FREQUENCY PREDICTION OF STAGED COMBUSTION ROCKET ENGINE BASED ON RBF NEURAL NETWORK

Jixie qiangdu, 2015
In order to avoid creating or modifying the huge amount of finite element model of the rocket engine,application of the RBF（ radial basis function） neural network which was used to predict structural frequency of the liquid rocket engine was analyzed.
DU FeiPing, TAN YongHua, CHEN JianHua
doaj  

Synergistic effects of annealing heat treatment and lignocellulose fiber incorporation on the thermal, mechanical, and water absorption properties of poly(lactic acid)‐based biocomposites

Polymer Composites, EarlyView.
The effect of molecular structure on the moisture absorption of PLA/cellulose biocomposites. Abstract This study investigates the effect of annealing heat treatment on polymer composites composed entirely of biodegradable components. Poly(lactic acid) (PLA) was used as the matrix material paired with three different types of commercial lignocellulose ...
Sándor Kálmán Jakab, Virág Luca Bódi, László Lendvai   +2 more
wiley   +1 more source