Results 61 to 70 of about 958,962 (214)

Space engine safety system [PDF]

A rocket engine safety system was designed to initiate control procedures to minimize damage to the engine or vehicle or test stand in the event of an engine failure. The features and the implementation issues associated with rocket engine safety systems
Maul, William A., Meyer, Claudia M.
core   +1 more source

An Adaptive Whole‐Body Control Approach for Dynamic Obstacle Avoidance of Mobile Manipulators for Human‐Centric Smart Manufacturing

IET Collaborative Intelligent Manufacturing
In human‐centric smart manufacturing (HCSM), the robot's dynamic obstacle avoidance function is crucial to ensuring human safety. Unlike the static obstacle avoidance of manipulators or mobile robots, the dynamic obstacle avoidance in mobile manipulators
Yong Tao, He Gao, Donghua Tan, Jiahao Wan, Baicun Wang, Chengxi Li, Pai Zheng   +6 more
doaj   +1 more source

A novel configuration for single-crystal superalloy hollow blade manufacturing based on shell/core integral mold

Journal of Materials Research and Technology
Shell/core integral mold fabricated by additive manufacturing possess high shell/core bonding strength, which is promising to improve the dimensional accuracy and integrity of single-crystal (SX) hollow blade while improving the manufacturing efficiency.
Binqiang Wang, Zhexu Li, Kun Bu, Zhongliang Lu, Jiawei Zhang, Sheng Mou, Shengjie Ren, Haoyu Zhao   +7 more
doaj   +1 more source

Tip gap size effects on thermal performance of cavity-winglet tips in transonic turbine cascade with endwall motion

Journal of the Global Power and Propulsion Society, 2017
The thermal performance of two cavity-winglet tips with endwall motion is investigated in a transonic high pressure turbine cascade, which operates at an engine representative exit Mach number of 1.2 and an exit Reynolds number of 1.7 × 106.
Fangpan Zhong, Chao Zhou
doaj   +1 more source

Energy efficient engine high pressure turbine ceramic shroud support technology report [PDF]

This work represents the development and fabrication of ceramic HPT (high pressure turbine) shrouds for the Energy Efficient Engine (E3). Details are presented covering the work performed on the ceramic shroud development task of the NASA/GE Energy ...
Carlson, R. G., Nelson, W. A.
core   +1 more source

Gas exchange optimization in aircraft engines using sustainable aviation fuel: A design of experiment and genetic algorithm approach

Energy and AI
The poppet valves two-stroke (PV2S) aircraft engine fueled with sustainable aviation fuel is a promising option for general aviation and unmanned aerial vehicle propulsion due to its high power-to-weight ratio, uniform torque output, and flexible valve ...
Zheng Xu, Jinze Pei, Shuiting Ding, Longfei Chen, Shuai Zhao, Xiaowei Shen, Kun Zhu, Longtao Shao, Zhiming Zhong, Huansong Yan, Farong Du, Xueyu Li, Pengfei Yang, Shenghui Zhong, Yu Zhou   +14 more
doaj   +1 more source

Injector element characterization methodology [PDF]

Characterization of liquid rocket engine injector elements is an important part of the development process for rocket engine combustion devices. Modern nonintrusive instrumentation for flow velocity and spray droplet size measurement, and automated ...
Cox, George B., Jr.
core   +1 more source

An overview of NASA research on positive displacement general-aviation engines [PDF]

, 1980
The research and technology program related to improved and advanced general aviation engines is described. Current research is directed at the near-term improvement of conventional air-cooled spark-ignition piston engines and at future alternative ...
Kempke, E. E., Jr.
core   +1 more source

Who needs engine monitoring? [PDF]

Operational evaluations of engine monitoring systems (EMS) are discussed.
Pettigrew, J. L.
core   +1 more source

Secondary electric power generation with minimum engine bleed [PDF]

, 1983
Secondary electric power generation with minimum engine bleed is discussed. Present and future jet engine systems are compared. The role of auxiliary power units is evaluated.
Tagge, G. E.
core   +1 more source