Results 241 to 250 of about 49,702 (288)

Clinical exploration of flexible ureteroscopy combined with holmium laser and intraoperative ultrasound localization for the treatment of stones in non-communicating calyceal diverticula: a single case report. [PDF]

Front Surg
Wang Q, Xu Y, Cheng L, Chen X, Huang H, Ao P.   +5 more
europepmc   +1 more source

A modified guidewire technique for managing non-deflating anchoring balloon transurethral catheters in emergency procedures. [PDF]

World J Emerg Med
Chen W, Tang M, Chen L, Liu Y.
europepmc   +1 more source

Towards Robot-Assisted MRI-Guided Lumbar Injections. [PDF]

Int Symp Med Robot
Lehrfeld T, Wang Q, Jain A, Chari V, Iordachita I.   +4 more
europepmc   +1 more source

Combined endoscopic and long ileus tube treatment for giant gastric bezoars with ileus in a child. [PDF]

Endoscopy
Zhang L, Fu XL, Shi M, Wei XX.
europepmc   +1 more source

Study on Effect of Rotor Vibration on Tip Clearance Variation and Fast Active Control of Tip Clearance

Advanced Materials Research, 2010
The tip clearance flow of axial turbomachines is important for their aerodynamic and maneuver performance. And the tip clearance gap leakage flow is of continuing concern in reducing efficiency losses that occur within turbines. In order to gain significant reductions in emissions and specific fuel consumption as well as dramatic improvements in ...
Bing Hui Jia, Xiao Dong Zhang
openaire   +2 more sources

Tip-Clearance Effects in Centrifugal Pumps

Journal of Basic Engineering, 1965
Several design models of centrifugal pump impellers were tested in water to determine tip-clearance effects on noncavitating and cavitating performance. Although most of these impellers were designed without tip shrouds, three direct comparisons for shrouded versus unshrouded models are included.
G. M. Wood, H. Welna, R. P. Lamers
openaire   +2 more sources

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Numerical simulation on the effect of tip clearance size on unsteadiness in tip clearance flow

Journal of Thermal Science, 2008
Unsteadiness of tip clearance flow with three different tip clearance sizes is numerically investigated in this paper. NASA Rotor 67 is chosen as the computational model. It is found that among all the simulated cases, the unsteadiness exists when the size of the tip clearance is equal to or larger than design tip clearance size.
Juan Du, Feng Lin, Du Juan
exaly   +2 more sources

Role of tip injection in desensitizing the compressor to the tip clearance size

Aerospace Science and Technology, 2016
Abstract Numerical simulations are performed to investigate the role of tip injection in desensitizing a transonic compressor rotor to the detrimental effects of tip leakage flow. First, the effects of tip clearance size on the compressor stability and performance are investigated.
Hossein Khaleghi
exaly   +2 more sources

Effects of Rotor Tip Clearance on Tip Clearance Flow Potentially Leading to NSV in an Axial Compressor

Volume 7: Structures and Dynamics, Parts A and B, 2012
This paper investigates non-synchronous vibration (NSV) mechanism of a high-speed axial compressor with three different rotor tip clearances. Numerical simulations for 1/7th annulus periodic sector are performed using an unsteady Reynolds-averaged Navier-Stokes(URANS) solver with a fully conservative sliding boundary condition to capture wake ...
Hong-Sik Im, Ge-Cheng Zha
openaire   +2 more sources