Results 11 to 20 of about 207,078 (313)

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

Derivation of Navier–Stokes equation in rotational frame for engineering flow analysis

International Journal of Thermofluids, 2021
One of the most frequently used governing equations underpinning engineering flow analysis is the renowned Navier–Stokes (NS) equation. Several references regarding the derivation of equation of motion in Cartesian coordinates are available in standard ...
Sananth H. Menon, Ramachandra Rao A, Jojo Mathew, Jayaprakash J   +3 more
doaj   +1 more source

Research on performance of PBT/Bu-NENA low-vulnerability propellant

FirePhysChem, 2022
Large-size program temperature controller was used to carry out the slow cook-off test study of PBT, Bu-NENA, PBT/Bu-NENA mixture and PBT/Bu-NENA propellant in the range of gram and kilogram scale.
Miaomiao Li, Zhipeng Zhou, Jingjing Chen, Tingting Zheng, Lianchao Cheng, Sen Xu   +5 more
doaj   +1 more source

Orifice Flow Dynamics in a Rocket Injector as an Excitation Source of Injector-Driven Combustion Instabilities

Aerospace, 2023
To investigate a hypothesis of the orifice flow-induced instability in rocket engine thrust chambers, a single liquid oxygen (LOX) injector with an optically accessible orifice module was used for experiments, with water as a simulant for LOX.
Min Son, Michael Börner, Wolfgang Armbruster, Justin S. Hardi   +3 more
doaj   +1 more source

Designing displaced lunar orbits using low-thrust propulsion [PDF]

, 2010
The design of spacecraft trajectories is a crucial task in space mission design. Solar sail technology appears as a promising form of advanced spacecraft propulsion which can enable exciting new space science mission concepts such as solar system ...
Colin R. McInnes, Farquhar R., Gómez G., Gómez G., Jules Simo, Leipold M., Roy A. E., Simo J., Thurman R., Vonbun F.   +9 more
core   +1 more source

Flame characteristics of a high-pressure LOX/H2 rocket combustor with large optical access

Case Studies in Thermal Engineering, 2021
Hot fire tests were performed with a newly developed single-injector research combustor featuring a large optical access (255 × 38 mm) for flame imaging.
Jan Martin, Wolfgang Armbruster, Robert Stützer, Stephan General, Bernhard Knapp, Dmitry Suslov, Justin Hardi   +6 more
doaj   +1 more source

Development of a Laser Micro-Thruster and On-Orbit Testing

Aerospace, 2023
Laser micro-thrust technology is a type of propulsion that uses a laser beam to ablate a propellant such as a metal or plastic. The ablated material is expelled out the back of the spacecraft, generating thrust.
Jifei Ye, Sibo Wang, Hao Chang, Yanji Hong, Nanlei Li, Weijing Zhou, Baoyu Xing, Bangdeng Du, Chengyin Xie   +8 more
doaj   +1 more source

Facile Preparation of a Novel HfC Aerogel with Low Thermal Conductivity and Excellent Mechanical Properties

Gels, 2023
Aerogels emerge as captivating contenders within the realm of high-temperature thermal resistance and thermal insulation. Nevertheless, their practical applications are usually constrained by their inherent brittleness when subjected to rigorous ...
Wei Wang, Zhanwu Wu, Shicong Song, Qi You, Sheng Cui, Weimin Shen, Guoqing Wang, Xuanfeng Zhang, Xiaofei Zhu   +8 more
doaj   +1 more source

Comparison of Submillimeter Spot Ablation of Copper and Nickel by Multipulse Picosecond and Femtosecond Laser

Metals, 2022
The current transmission and reflection laser ablation micropropulsion modes have the problem of a complex working medium supply system in engineering. Therefore, we propose large-spot laser ablation with a one-dimensional supply mode. In order to verify
Mingyu Li, Jifei Ye, Lan Li, Bangdeng Du, Ying Wang, Heyan Gao, Chenghao Yu   +6 more
doaj   +1 more source

Study of Tensile Strength of Aluminum Alloy Caused by Pulsed Laser Drilling

Metals, 2022
In the process of pulsed laser drilling, the material properties in the heat-affected zone will change due to the thermal effect of the laser. To study the effect of this change on the material tensile strength, two lasers were used to punch the standard
Heyan Gao, Ying Wang, Jifei Ye, Lan Li, Bangdeng Du, Sai Li, Mingyu Li   +6 more
doaj   +1 more source