Results 21 to 30 of about 32,505 (164)

Additively manufactured aluminium nested composite hybrid rocket fuel grains with breathable blades

Virtual and Physical Prototyping, 2023
Hybrid rocket engines suffer from the restricted mechanical properties and low regression rates of current polymeric fuel grains. We propose a three-dimensional printed aluminium (Al) nested composite fuel grain with millimetre-scale lattice pores ...
Dandan Qu, Xin Lin, Kun Zhang, Zhiyong Li, Zezhong Wang, Guoliang Liu, Yang Meng, Gengxing Luo, Ruoyan Wang, Xilong Yu   +9 more
doaj   +1 more source

Numerical Investigation on Hybrid Rocket Motors with Star-Segmented Rotation Grain

Aerospace, 2022
A novel fuel grain configuration comprising two star-segmented grains is proposed. The effect of the rotation, mid-chamber length, and segmented position on the fuel regression rate and the combustion efficiency in hybrid rocket motors with star ...
Hui Tian, Xianzhu Jiang, Yudong Lu, Yu Liang, Hao Zhu, Guobiao Cai   +5 more
doaj   +1 more source

Validation of Integral Method for Numerical Prediction of Hybrid Rocket Internal Ballistics

Journal of Fluid Science and Technology, 2013
In order to design hybrid rocket engines, we developed a numerical prediction method which describes the internal ballistics, thus the solid fuel regression rate. In order to obtain a fast code, simple but efficient models have been implemented.
Yuki FUNAMI, Toru SHIMADA
doaj   +1 more source

Effect of combustion pressure on regression rate of solid fuel under an impinging oxidizer jet counterflow diffusion flame

Journal of Thermal Science and Technology, 2014
Flame spread and counterflow diffusion flame experiments are widely conducted to investigate the combustibility of solid fuels. Although the use of the gas phase Damköhler number to organize the flame spread rate or regression rate of a solid fuel is ...
Ken TERAKAWA, Tatsuya SAITO, Yuji NAKAMURA, Tsuneyoshi MATSUOKA, Harunori NAGATA, Tsuyoshi TOTANI, Masashi WAKITA   +6 more
doaj   +1 more source

Review on the regression rate-improvement techniques and mechanical performance of hybrid rocket fuels

FirePhysChem, 2021
Human spaceflight, space tourism, and the launch of microsatellites are all expected to grow in the future. In fact, with the recent increase of the satellite market, almost 1000 smallsats per year are foreseen to be launched over the next decade. Hybrid
Yash Pal, Sri Nithya Mahottamananda, Sasi Kiran Palateerdham, Sivakumar Subha, Antonella Ingenito   +4 more
doaj   +1 more source

Photogrammetry-Based Analysis of Local Regression Rate in Solid Fuel Ramjets

Aerospace
Solid fuel ramjets (SFRJs) are air-breathing propulsion systems with a high specific impulse, but their sudden expansion combustors often exhibit axially nonuniform fuel regression because of the distinct recirculation, reattachment, and downstream ...
Suhan Ko, Hasang Jeon, Sungjune Kim, Iksoo Park, Jungpyo Lee, Heejang Moon   +5 more
doaj   +1 more source

Combustion Characteristics of HTPB-Based Hybrid Rocket Fuels: Using Nickel Oxide as the Polymer Matrix Pyrolysis Catalyst

Aerospace, 2023
The slow regression rate induced by the high pyrolysis difficulty has limited the application and development of hydroxyl-terminated polybutadiene (HTPB)-based fuels in hybrid rocket propulsion.
Hongsheng Yu, Xiaodong Yu, Hongwei Gao, Luigi T. DeLuca, Wei Zhang, Ruiqi Shen   +5 more
doaj   +1 more source

Beeswax–EVA/Activated-Charcoal-Based Fuels for Hybrid Rockets: Thermal and Ballistic Evaluation

Energies, 2022
Beeswax (C46H92O) is a naturally derived substance that has the potential to be used as a solid fuel for hybrid rocket applications and as a substitute for paraffin wax fuel in hybrid rockets.
Sri Nithya Mahottamananda, Yash Pal, Mengu Dinesh, Antonella Ingenito   +3 more
doaj   +1 more source

Predicting Gasoline Vehicle Fuel Consumption in Energy and Environmental Impact Based on Machine Learning and Multidimensional Big Data

Energies, 2022
The underestimation of fuel consumption impacts various aspects. In the vehicle market, manufacturers often advertise fuel economy for marketing. In fact, the fuel consumption reference value provided by the manufacturer is quite different from the real ...
Yushan Yang, Nuoya Gong, Keying Xie, Qingfei Liu   +3 more
doaj   +1 more source

Fuel Grain Configuration Adaptation for High-Regression-Rate Hybrid Propulsion Applications

Aerospace
Low regression rate is the most critical issue for the development and application of hybrid rocket motors (HRMs). Paraffin-based fuels are potential candidates for HRMs due to their high regression rates but adding polymers to improve strength results ...
Lin-Lin Liu, Bo-Biao Li, Ze-Xin Chen, Song-Qi Hu   +3 more
doaj   +1 more source