Results 231 to 240 of about 13,535 (261)

Free Margin Running Suture Repair for Bileaflet Mitral Valve Prolapse in Patients with Left Ventricular Dysfunction: A Mid-term Follow-up Study. [PDF]

open access: yesInterdiscip Cardiovasc Thorac Surg
Agnino A   +5 more
europepmc   +1 more source

Cavitating flow in annular jet pumps

International Journal of Multiphase Flow, 2015
Abstract Based on the experimental and numerical methods, the pump performance and inner flow details of annular jet pumps under three area ratios (cross sectional area ratio of throat and nozzle) were studied in the present paper. The cavity clouds forming at the shearing layer, recirculation center and throat inlet were captured via high speed ...
L. Xiao, X. Long
openaire   +3 more sources

Recirculation in an Annular-Type Jet Pump

Journal of Fluids Engineering, 1994
For some annular-type jet pump applications, it is important to avoid formation of a recirculation zone in the mixing region. The goals of this research were to find (i) when recirculation occurs and (ii) the size and location of the resulting recirculation zone. Experiments were performed using air in a straight-walled, annular-type, ducted jet.
Donald F. Elger   +2 more
openaire   +3 more sources

Numerical investigation on the recirculation in annular jet pumps

Journal of Mechanical Science and Technology, 2013
The flow within the annular jet pump (AJP), in some degree, resembles the annular wall jet developing in a pipe with great axial pressure gradient. In some working conditions, there exists the backflow near the centerline. However this differs from the case in a center jet pump (CJP) that the recirculation emerges near the inner wall of the throat. The
Longzhou Xiao   +4 more
openaire   +3 more sources

Two-dimensional numerical simulations on the performance of an annular jet pump

Journal of Visualization, 2002
Two-dimensional numerical simulations were carried out to investigate the effects of the shape of mixing chamber on the performance of annular jet pumps for several jet flow rates. We confined the computational domain to a jet, a mixing chamber, and the outlet of the pump.
O. B. Kwon   +3 more
openaire   +3 more sources

Large eddy simulation of turbulent flow structure and characteristics in an annular jet pump

Journal of Hydrodynamics, 2017
The large eddy simulation(LES) of the flow characteristics in an annular jet pump (AJP) is conducted, and the flow characteristics are systematically analyzed from both time-averaged and instantaneous aspects. The jet expansion, the velocity distribution and the energy are considered to analyze the time-averaged evolution of the flow field in the AJP ...
Mao-sen Xu   +3 more
openaire   +3 more sources

Suction performance improvement of an annular jet pump by J-groove passage shape optimization

Journal of Mechanical Science and Technology, 2021
Ujjwal Shrestha, Young-Do Choi
openaire   +3 more sources

Numerical Study of Flow Inside an Annular Jet Pump

Journal of Thermophysics and Heat Transfer, 2006
Nomenclature AJ = sectional area of annular jet Ao, Do = area, inner diameter of suction and delivery lines Aso, Dso = area, exit diameter of central suction nozzle At , Dt = area, inner diameter of mixing chamber Cp = pressure coefficient = [(Px − Ps)]/[0.5ρV 2 J ] Lt = length of mixing chamber L ′ = total length of the convergent nozzle and the ...
M. El Gazzar   +2 more
openaire   +1 more source

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