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The Transfer Functions of Rocket Nozzles [PDF]

Journal of the American Rocket Society, 1952
The transfer function is defined as the fractional oscillating mass flow rate divided by the fractional sinusoidal pressure oscillation in the rocket combustion chamber. This is calculated as a function of the frequency of oscillation. For very small frequencies, the transfer function is approximately 1 with a small "lead component." For very large ...
Tsien, H. S.
openaire   +3 more sources

Effect of High-Mass Fraction of Aluminum on Catalytic Hybrid Rocket Motor

Applied Sciences, 2022
Catalytic hybrid rocket motors using hydrogen peroxide (HP) are easy and efficient to achieve multiple starts and stops, and hydroxyl-terminated polybutadiene (HTPB) grains are commonly used due to their excellent mechanical properties.
Hui Tian, Zhongshuo Wang, Hao Zhu, Yudong Lu, Jingfei Gao, Guobiao Cai   +5 more
doaj   +1 more source

Coupled Thermo-Structural Analysis Model of Solid Rocket Motor Nozzle considering the Variation of Friction Coefficient under Operating Conditions

International Journal of Aerospace Engineering, 2022
Multi-interface is a typical feature of solid rocket motor nozzles, and the interface evolution law is an important aspect to analyze the thermo-structural response of solid rocket motor nozzles.
Lin Sun, Huiyin Jia, Nan Zhang, Yu Zhao, Futing Bao   +4 more
doaj   +1 more source

Impacts of Micro-Deviations of Aperture on the Characteristics of Collision Atomization Field

Applied Sciences, 2022
As the final flow channel of the liquid rocket engine, the manufacturing of impinging atomization nozzles has become a critical link in the manufacture of impinging atomization components. At present, the high-precision machining of millimeter nozzles in
Yarui Ma, Jiwen Cui, Hui Wang, Jiubin Tan   +3 more
doaj   +1 more source

Ablation performance of 3D C/SiC composite nozzles under double-component liquid power environment

Cailiao gongcheng, 2022
In order to explore the ablation characteristics of C/SiC ceramic composite nozzles in the working environment of liquid rocket engines, 3D C/SiC composite nozzle was prepared by the precursor impregnation pyrolysis(PIP) process, and the ablation test of
BAI Longteng, CHENG Laifei, YANG Xiaohui, CAO Jing, WANG Yi   +4 more
doaj   +1 more source

Propulsion tests on ultra-high-temperature ceramic matrix composites for reusable rocket nozzles

Journal of Advanced Ceramics, 2023
Ultra-high-temperature ceramic matrix composites (UHTCMCs) based on a ZrB2/SiC matrix have been investigated for the fabrication of reusable nozzles for propulsion.
Diletta Sciti, Antonio Vinci, Luca Zoli, Pietro Galizia, Simone Failla, Stefano Mungiguerra, Giuseppe D. Di Martino, Anselmo Cecere, Raffaele Savino   +8 more
doaj   +1 more source

Computational study of flow separation in truncated ideal contour nozzles under high-altitude conditions [PDF]

International Journal of Fluid Engineering
Flow separation in rocket nozzles has been studied mostly under sea-level conditions, which fail to take into account changes in ambient density and ambient pressure during the flight of a rocket.
Ijas Muhammed, V V, Shamsia Banu N, Abhilash Suryan, Vincent Lijo, David Simurda, Heuy Dong Kim   +5 more
doaj   +1 more source

Computational study on flow through truncated conical plug nozzle with base bleed

Propulsion and Power Research, 2019
Conical plug nozzle and truncated conical plug nozzle are advanced rocket nozzles suitable for use as altitude compensating nozzles. In this study flow through the conical plug and truncated conical plug nozzles are numerically simulated to first ...
Prasanth P. Nair, Abhilash Suryan, Heuy Dong Kim   +2 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

Film Cooling in Rocket Nozzles [PDF]

, 2020
Abstract In this project supersonic, tangential film cooling in the expansion part of a nozzle with rocket-engine like hot gas conditions was investigated. Therefore, a parametric study in a conical nozzle was conducted revealing the most important influencing parameter on film cooling for the presented setup.
Ludescher, Sandra Christine, Olivier, Herbert   +1 more
openaire   +2 more sources