Results 71 to 80 of about 474,823 (307)

Research on the Impact of Labyrinth Seal Ring Tooth Profile on the Pressure Pulsation of Leakage Chambers in High-Speed Centrifugal Pumps

Lubricants
The gap seal ring is a critical component in high-speed centrifugal pumps. The leakage rate and performance of the pump are sensitive to variation in seal ring parameters.
Guodong Zhao, Jiahao Xu, Jie Lian, Yanpi Lin, Zuchao Zhu   +4 more
doaj   +1 more source

Numerical Study on Flow Characteristics in a Francis Turbine during Load Rejection

Energies, 2019
Labyrinth seals are not usually included in the numerical models of hydraulic machinery to simplify the geometric modeling, and thereby reduce the calculation burden.
Daqing Zhou, Huixiang Chen, Jie Zhang, Shengwen Jiang, Jia Gui, Chunxia Yang, An Yu   +6 more
doaj   +1 more source

Mechanistic modeling of CO2 well leakage in a generic abandoned well through a bridge plug cement-casing gap [PDF]

, 2020
Both known and unmapped plugged and abandoned wells are potential leakage pathways for CO2 from geologic carbon sequestration (GCS) sites. Although many abandoned wells have cement bridge plugs installed to prevent leakage, the seal between the cement ...
Oldenburg, CM, Pan, L
core   +1 more source

Model experiment on the dynamic process of oil leakage from the double hull tanker [PDF]

, 2016
This paper presents an experimental investigation on oil leakage from the double hull tanker (DHT). It is designed to explore the dynamic process of oil leakage from bottom-rupture hole of DHT. The experimental test shows the leakage resistance mechanism
Liu, F., Lu, J., Wu, H., Wu, W., Xu, S., Yan, S., Yang, H., Yang, Z.   +7 more
core   +1 more source

Interaction between Molten Al‐Killed Mn–B Steel and Carbon‐Bonded MgO Refractories Based on Recyclates

Advanced Engineering Materials, EarlyView.
High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé, Lukas Neubert, Anton Yehorov, Till M. J. Stadtmüller, Christos G. Aneziris, Olena Volkova   +5 more
wiley   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Flow Characteristics and Loss Mechanism of Tip Leakage Flow in Mining Contra-Rotating Axial Flow Fan

Applied Sciences
Tip leakage flow interacts with the mainstream, impacting the energy transmission process within the impeller of the fan and causing a significant flow loss.
Yongping Chen, Ronghua Liu, Wenqing Peng, Shiqiang Chen   +3 more
doaj   +1 more source

Effects of Leakage Neutral Particles on Shocks

, 2012
In this paper we investigate effects of neutral particles on shocks propagating into the partially ionized medium. We find that for 120 km/s < u_{sh} < 3000 km/s (u_{sh} is the shock velocity), about ten percent of upstream neutral particles leak into ...
Abdo, Abdo, Axford, Bamba, Barnett, Bell, Blasi, Cassam-Chenaï, Drury, Ghavamian, Ghavamian, Giordano, Giuliani, Heng, Heng, Kirk, Krymsky, Lee, Ohira, Ohira, Ohira, Ohira, Ohira, Rakowski, Raymond, Spitzer, Tavani, Vink, Yutaka Ohira, Zirakashvili   +29 more
core   +1 more source

Diagnosis of venous incompetence inerectile dysfunction [PDF]

, 1990
In 26 of 214 patients with erectile dysfunction and proved venous incompetence by cavernosography, an additional bidirectional Doppler ultrasound was performed also to demonstrate venous outflow disturbances. All except one leakage in the superficial and
Bähren, Wolfgang, Gall, Helmut, Holzki, G., Scherb, Wolfgang, Sparwaser, C. H., Stief, Christian Georg   +5 more
core   +1 more source