Results 31 to 40 of about 11,940,761 (361)

Performance of discrete heat engines and heat pumps in finite time [PDF]

, 2000
The performance in finite time of a discrete heat engine with internal friction is analyzed. The working fluid of the engine is composed of an ensemble of noninteracting two level systems.
A. Bejan, A. Ben-Shaul, A. Calvo Hernandez, B. Andresen, C. Cohen-Tanoudji, C. Rose-Innes, E. Geva, E. Geva, E. Geva, F. L. Curzon, F. Wu, H. Scovil, I. Oppenheim, J. C. Chen, J. Geusic, J. Geusic, J. M. Gordon, J. M. Gordon, L. Szilard, N. Balakrishnan, P. Salamon, P. Salamon, P. T. Landsberg, P. T. Landsberg, R. D. Levine, R. Kosloff, Ronnie Kosloff, S. Blau, S. Lloyd, S. Mafe, S. Velasco, S. Velasco, T. Feldmann, Tova Feldmann, Z. J. Yan, Z. Yan   +35 more
core   +3 more sources

Biodiesel Production from Waste Sunflower Oil and Engine Performance Tests

International Journal of Automotive Science and Technology, 2020
In this study, biodiesel is produced from waste sunflower oil and its ef-fect on engine performance and specific fuel consumption is experimen-tally investigated. Transesterification method was used in biodiesel pro-duction of waste sunflower oil.
Sedef Köse, Gizemnur Aylanşik, M. Babagiray, T. Kocakulak   +3 more
semanticscholar   +1 more source

Energy Consumption Model for Drilling Processes Based on Cutting Force

Applied Sciences, 2019
Accurate energy consumption modelling is critical for the improvement of energy efficiency in machining. Existing energy models of machining processes mainly focus on turning or milling, and there are few energy models for drilling.
Qi Wang, Dinghua Zhang, Bing Chen, Ying Zhang, Baohai Wu   +4 more
doaj   +1 more source

Engine performance characteristics and evaluation of variation in the length of intake plenum [PDF]

, 2020
In the engine with multipoint fuel injection system using electronically controlled fuel injectors has an intake manifold in which only the air flows and, the fuel is injected into the intake valve.
Abu Bakar, Muhammad Azman, Ithsan, Mohammad Zaki, Khalid, Amir, Manshoor, Bukhari, Zainal Abidin, Shaiful Fadzil   +4 more
core  

Study on the Engagement Characteristics and Control Strategy of High Speed Difference Dry Friction Clutch

Machines, 2023
In the short/vertical take-off and landing aircraft propulsion system, the vertical take-off/landing and rapid flight are switched through the engagement and disconnection of the dry friction clutch. The smooth and rapid connection of the friction clutch
Chu Zhu, Zhi Chen, Zongcai Shi, Yingdong Zhang   +3 more
doaj   +1 more source

Simulation evaluation and verification of bird ingestion ability of turbofan engine

Hangkong gongcheng jinzhan
The bird-swallowing ability of engine must meet the requirements of the national military standard and airworthiness. It is necessary to propose a reliable method to assess the bird-swallowing ability of the engine before bird-swallowing tests, the test ...
JIA Chao, FAN Jie, JIANG Tongtong, CHEN Qian   +3 more
doaj   +1 more source

Signal Improvement for Underwater Measurement of Metal Samples Using Collinear Long-Short Double-Pulse Laser Induced Breakdown Spectroscopy

Frontiers in Physics, 2020
We employed a collinear long-short double-pulse laser induced breakdown spectroscopy (LS-DP-LIBS) to detect the underwater metal samples. The emission spectra, time-resolved signal, plasma images and sound characteristics of plasma shockwaves are ...
Minchao Cui, Minchao Cui, Minchao Cui, Yoshihiro Deguchi, Yoshihiro Deguchi, Zhenzhen Wang, Zhenzhen Wang, Changfeng Yao, Liang Tan, Dinghua Zhang   +9 more
doaj   +1 more source

Prediction of Chatter Stability in Bull-Nose End Milling of Thin-Walled Cylindrical Parts Using Layered Cutting Force Coefficients

Applied Sciences, 2023
During the bull-nose end milling operations of thin-walled structures, chatter usually occurs and adversely affects cutter performance, finished surface quality, and production efficiency. To accurately predict chatter stability, a suitable dynamic model
Xu Zhou, Congpeng Zhang, Minggang Xu, Baohai Wu, Dinghua Zhang   +4 more
doaj   +1 more source

Engineering high-performance database engines [PDF]

Proceedings of the VLDB Endowment, 2014
Developing a database engine is both challenging and rewarding. Database engines are very complex software artifacts that have to scale to large data sizes and large hardware configurations, and developing such systems usually means choosing between different trade-offs at various points of development.
openaire   +1 more source

AiResearch QCGAT engine performance and emissions tests [PDF]

, 1980
Results of aerodynamic performance and emission tests, conducted on a specially designed QCGAT engine in the 17,793-N (4,000 lb) thrust class, are presented. Performance of the AiResearch QCGAT engine was excellent throughout all testing.
Norgren, W. M.
core   +1 more source