Results 21 to 30 of about 9,373,613 (338)

Experimental investigation on relationship between heat transfer and sealing characteristics under different pressure ratios in labyrinth seals with orthogonal method

Ain Shams Engineering Journal, 2023
25 models are designed according to the orthogonal table, to study the comprehensive relationship between heat transfer and sealing characteristics in straight-through labyrinth seals with different geometrical parameters. The experimental investigations
Zhang Bo, Yang Sheng, Zhang Jun, Lin Zi-Qiang, JI Hong-hu   +4 more
doaj   +1 more source

Monitoring Porcelain Insulator Condition Based on Leakage Current Characteristics

Materials, 2022
Insulator monitoring using leakage current characteristics is essential for predicting an insulator’s health. To evaluate the risk of flashover on the porcelain insulator using leakage current, experimental investigation of leakage current indices was carried out.
Ali Ahmed Salem, Kwan Yiew Lau, Mohd Taufiq Ishak, Zulkurnain Abdul-Malek, Samir A. Al-Gailani, Salem Mgammal Al-Ameri, Ammar Mohammed, Abdulaziz Ali Saleh Alashbi, Sherif S. M. Ghoneim   +8 more
openaire   +3 more sources

Experimental Investigation on Near-Field Acoustic Propagation Characteristics of Leakage Detection in Submarine Pipelines

Journal of Marine Science and Engineering, 2023
The leakage of subsea oil and gas pipelines can have adverse impacts on production progress and the ecological environment. Investigating the sound source and near-field sound propagation of pipeline leaks is essential for understanding the acoustic ...
Kang Zhang, Ruize Ma, Tao Geng, Jiannan Yang, Yongjun Gong   +4 more
doaj   +1 more source

The Effect of Inlet Swirl on the Rotordynamic Shroud Forces in a Centrifugal Pump [PDF]

, 1992
The role played by fluid forces in determining the rotordynamic stability of a centrifugal pump is gaining increasing attention. The present research investigates the contributions to the rotordynamic forces from the discharge-to-suction leakage flows ...
Acosta, A. J., Brennen, C. E., Caughey, T. K., Guinzburg, A.   +3 more
core   +2 more sources

Influence of flow pattern on leakage acoustic signal of multiphase pipeline

You-qi chuyun, 2021
In order to solve the problem that it is difficult to apply the existing leakage detection mechanism of singlephase pipelines with no consideration to the influence of flow patterns to the multiphase pipelines, the theoretical study and test analysis ...
Yi WANG, Junfei LI, Baoqiang JI, Jian JI
doaj   +1 more source

Dual barrier InAlN/AlGaN/GaN-on-silicon high-electron-mobility transistors with Pt and Ni based gate stacks [PDF]

, 2017
In this work, we report the performance of 3 μm gate length "dual barrier„ InAlN/AlGaN/GaN HEMTs on Si substrates with gate-drain contact separations in the range 4-26 μm.
Cho, Sung-Jin, Floros, Konstantinos, Guiney, Ivor, Hemakumara, Dilini, Humphreys, Colin J., Li, Xu, Moran, David A.J., Thayne, Iain G., Wallis, David J., Wasige, Edward   +9 more
core   +1 more source

Leakage current characteristics in estimating insulator reliability: experimental investigation and analysis

Scientific Reports, 2022
The monitoring of leakage current (LC) and voltage characteristics in transmission line insulators is regarded as a good technique for anticipating the physical state of in-service insulators.
A. Salem, K. Y. Lau, W. Rahiman, Z. Abdul-Malek, S. A. Al-Gailani, R. A. Rahman, S. Al-Ameri   +6 more
semanticscholar   +1 more source

Polymeric Insulator Conditions Estimation by Using Leakage Current Characteristics Based on Simulation and Experimental Investigation

Polymers, 2022
The current work contributes an estimate of the time-frequency characteristics of a leakage current in assessing the health condition of a polluted polymeric insulator.
A. Salem, K. Y. Lau, Z. Abdul-Malek, N. Mohammed, A. Al-Shaalan, A. A. Al‐Shamma'a, Hassan M. H. Farh   +6 more
semanticscholar   +1 more source

Research on Leakage Current Waveform Spectrum Characteristics of Artificial Pollution Porcelain Insulator

Frontiers in Energy Research, 2021
The surface discharge development processes of polluted porcelain insulators for power transmission lines are tightly related with the development of leakage current (LC), the characteristics of LC, the insulating condition, and discharge intensity of ...
Chunhua Fang, Y. Tao, Jianguo Wang, H. You, Yan Cui, Mi Zhou   +5 more
semanticscholar   +1 more source

Model predictions and experimental results for the rotordynamic characteristics of leakage flows in centrifugal pumps [PDF]

, 1993
The role played by fluid forces in determining the rotordynamic stability and characteristics of a centrifugal pump is gaining increasing attention. The present research investigates the contributions to the rotordynamic forces from the discharge-to ...
Brennen, Christopher E., Guinzburg, Adiel   +1 more
core   +1 more source