Results 1 to 10 of about 17,952 (192)

Exploiting nozzle geometry to predict resolution in extrusion-based bioprinting: mathematical modelling of a power-law fluid. [PDF]

R Soc Open Sci
Extrusion-based additive manufacturing (AM) is a popular technique used in the fabrication of three-dimensional constructs. Owing to the nonlinear manner in which process parameters affect resolution and printability, the optimal combination remains ...
Tansell AV, Mahmoodi N, Crolla JP, Dyson RJ, Luo GJ, Thomas-Seale LEJ.   +5 more
europepmc   +2 more sources

Study of Cooling Characteristics of Axisymmetric Tail Nozzle

Energies
In order to reduce the infrared radiation intensity of supersonic tail nozzles and in response to the increasingly severe battlefield infrared environment, simulations were conducted on axisymmetric expanding tail nozzles to study the effects of air, liquid nitrogen, and dry ice cold flows at different flow rates on the nozzle wall temperature.
Hao Zeng, Rui Xi, Yiwen Li, Xingyao Hou, Changqin Fu   +4 more
openaire   +3 more sources

Numerical simulation on the pressure distribution of hydraulic jet perforation tunnel in natural gas hydrate reservoirs. [PDF]

Sci Rep
Hydrajet fracturing could be a promising technique for increasing hydrate production; however, the pressure distribution law inside the perforation tunnel must first be investigated.
Zhou J, Shen K, Xie W, Yu Y, Wang Y, Ning B, Zhang K, Yu H.   +7 more
europepmc   +2 more sources

Performance of Two Types of High Speed, High Efficiency ‎Axisymmetric Intakes [PDF]

Journal of Applied and Computational Mechanics, 2021
Performance of two axisymmetric air intakes are compared at conditions suitable for Mach number range from 2 to 8. First is the Busemann intake and second is the reversed isentropic nozzle. The isentropic nozzle is built by the method of characteristics.
Vladislav Galkin, Vasily Fomin, Sannu Mölder, Dmitry Vnuchkov, Valery Zvegintsev   +4 more
doaj   +1 more source

Altitude-compensating axisymmetric supersonic nozzle design and flow analysis [PDF]

INCAS Bulletin, 2023
Altitude-adapted nozzles are designed to facilitate flow adaptation during rocket ascent in the atmosphere, without requiring mechanical activation. As a consequence, the performance of the nozzle is significantly improved.
Sidali HAIF, Hakim KBAB, Amina BENKHEDDA
doaj   +1 more source

Study on the Influence of Nozzle Ablation on the Performance of the Solid Rocket Motor

Aerospace, 2023
As a key component of the solid rocket motor, nozzle ablation is very important to the performance of the motor. In order to study the influence of the law of nozzle ablation on motor performance, a two-dimensional axisymmetric model of a ground state ...
Weiqiang Huang, Chunguang Wang, Kaining Zhang, Zhihong Wang, Weiping Tian   +4 more
doaj   +1 more source

Finite Element Analysis of Nozzle Erosion Caused by Abrasive Particles of Ultra High Pressure Water Jet [PDF]

Cailiao Baohu, 2022
In order to analyze and solve the erosion of the inside of nozzle caused by high - speed abrasive particles for improving the nozzle’s erosion and wear resistances and optimizing the structure design of ultra - high pressure jet nozzle, transient two ...
HUO Hongbo, LI Zhong, ZHANG Ming, ZHANG Binqi, HE Shiming, ZHANG Zhi
doaj   +1 more source

Numerical simulation of a vectored axisymmetric nozzle

AIP Conference Proceedings, 2020
A CFD based approach to the fully three-dimensional simulation of vectored nozzle is presented. The underlying tech- nology used is based on an active flow control technique known as Fluidic Thrust-Vectoring. The flow governing equations are solved by using a finite volume discretization of the compressible Unsteady RANS equations.
Roberto Marsilio, Michele Ferlauto, M. Hadi Hamedi-Estakhrsar   +2 more
openaire   +1 more source

Strength of Composite Transport and Launch Container for Rocket Launch

Journal of Mechanical Engineering, 2023
A transport and launch container for launching rockets made of fiberglass is considered. The main goal of the paper is to calculate the stress state of this container and check the strength conditions.
Kostiantyn V. Avramov, Volodymyr M. Sirenko, Volodymyr V. Zaverukha, Sergiy I. Plankovskyy, Yevgen V. Tsegelnyk, Volodymyr V. Kombarov   +5 more
doaj   +1 more source

Thrust Vectoring of a Fixed Axisymmetric Supersonic Nozzle Using the Shock-Vector Control Method

Fluids, 2021
The application of the Shock Vector Control (SVC) approach to an axysimmetric supersonic nozzle is studied numerically. SVC is a Fluidic Thrust Vectoring (FTV) strategy that is applied to fixed nozzles in order to realize jet-vectoring effects normally ...
Emanuele Resta, Roberto Marsilio, Michele Ferlauto   +2 more
doaj   +1 more source