نتایج جستجو برای: tunnel height

تعداد نتایج: 135793  

2013
Zahra Parhizkar Amir Khosrojerdi

Current weather indifferent fields of science and engineering research purposes and different applications are studied. One of the applications of climate studies, the study of the flow over the weir dam and lower exhaust tunnel is aimed at preventing the risk of cavitations. Aeration is known as one of the most economical and practical way to deal with cavitations on rapid spill ways. In the s...

2004
J. E. Sargison G. J. Walker R. Rossi

A low speed, open circuit, laboratory wind tunnel has been redesigned for use in turbine blade cooling experiments. The two dimensional contraction was designed using a sixth order polynomial. This paper outlines the process of design optimisation, using Computational Fluid Dynamics (CFD) to model the contraction. The parameters that were varied were the location of the point of inflection and ...

2013
Steven J. Wright James W. Lewis Jose G. Vasconcelos

Events that are referred to as geysers have been observed in stormwater or combined sewer systems and are associated with jets of water rising through manholes to a considerable distance above the ground surface. Visual observations suggest that air may be a significant component of the jet. The mechanisms of geyser occurrence have been previously assumed to originate in inertial oscillations t...

Journal: :iranian journal of radiology 0
kambiz motamedi professor of radiology, david geffen school of medicine; md, university of california, director, ucla beach imaging and interventional center usa, los angeles

this presentation will cover, appearance of normal nerve versus tendon; anisotropy (advantage and disadvantage); special case carpal tunnel; tendinopathy; nerve impingement; special case cubital tunnel.

2003
Xin Liu Xing Li

Tunnel Broker model, as defined in RFC3053, is a solution to the automation of IPv6 address assignment and IPv6 over IPv4 tunnel management. Tunnel server selection and fault tolerance are two big problems for a Tunnel Broker system. Anycast makes it possible to solve the tunnel server selection problem and improve the system’s fault tolerance. This paper proposes an architecture of the Tunnel ...

Journal: :Tunnelling and Underground Space Technology 2021

Abstract The present study investigates the maximum temperature and smoke back-layering length S in downhill direction from fire source a tilted tunnel under natural ventilation. Numerical simulations were conducted using FDS to flow behaviors for with nine slopes of 0, 1%, 2%, 3%, 4%, 5%, 6%, 7% 8%. It was found that, due stack effect, stagnated at distance direction. effects slope, ? , heat r...

Journal: :AIAA Journal 2022

Roughness trips are widely applied in wind-tunnel testing to hasten the laminar–turbulent boundary-layer transition. It is well known that they influence transition and its development. However, their on aeroacoustic quantities (in particular, airfoil trailing-edge noise) not yet fully understood. This paper discusses relationship between trip height development radiated noise. Wind-tunnel expe...

Journal: :Actuators 2022

Using a high-durability designed plasma electrode (PA), the actuation effect on both two-dimensional backward-facing step flow (standard model) and an arc-shaped three-dimensional (arc was investigated experimentally. First, we searched for operation control conditions suitable by carrying out experiments using medium-sized circulating wind tunnel. Next, natural-snow tunnel of Hokkaido Universi...

Journal: :acta medica iranica 0
nasser janmohammadi department of orthopedics, mobility impairment research center, babol medical sciences center, babol, iran.

numerous causes are reported for ulnar nerve compression at the wrist, known as guyon's tunnel syndrome. in the present article, a patient with guyon's tunnel syndrome during pregnancy concomitant with an anomaly of ulnar nerve is described. a 29-year-old iranian woman presented with clinical features of guyon's tunnel syndrome (pain and paresthesia in the fifth finger of the left hand and atro...

Journal: :Turkish neurosurgery 2012
Halil Kamil Oge Berat Acu Tacettin Gucer Tugra Yanik Safak Savlarli Mehmet Murat Firat

AIM The aim of this study was to try to find parametric ratios for the diagnosis and pathophysiology of carpal tunnel syndrome using MR. MATERIAL AND METHODS Dominant side wrist MRI examinations of 27 female carpal tunnel patients and 21 normal females were compared. The carpal tunnel contents area / carpal tunnel cross section area ratio was defined, analysed and discussed with the literatur...

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