نتایج جستجو برای: swirl ratio

تعداد نتایج: 503693  

2003
Milan Miklavčič

Existence of an exact solution of the Navier-Stokes equations representing swirling flow consisting of two fluid layers is proven. It is assumed that the fluid in the bottom layer is injected into the swirl from a rotating disk. This describes the case when a disk melts in an ambient fluid and the melted fluid is removed by rotation of the disk.

Journal: :Journal of the Belgian Society of Radiology 2015

Journal: :Science Bulletin 2015

2015
Yun Huang YUN HUANG

Combustion instability is a process which involves unsteady chemical kinetic, fluid mechanic, and acoustic processes. It can lead to unstable behavior and be detrimental in ways ranging from faster part fatigue to catastrophic system failure. In terms of combustion methodology, combustion instability has been a key issue for lean premixed combustion. The primary objective of this work is to imp...

2001
Vladimir Shtern Valery Zimin Fazle Hussain

New exact solutions, obtained for centrifugal convection of a compressible fluid in pipes and annular pipes, explain axially elongated counterflow and energy separation—poorly understood phenomena occurring in vortex devices, e.g., hydrocyclones and Ranque tubes. Centrifugal acceleration ~which can be up to 10 times gravity in practical vortex tubes!, combined with an axial gradient of temperat...

Journal: :Transactions of the Japan Society of Mechanical Engineers 1977

Journal: :American Journal of Roentgenology 1985

Journal: :Journal of The Brazilian Society of Mechanical Sciences and Engineering 2021

Single-phase heat transfer and pressure drop tests were conducted in a tube with two types of twisted tapes. Each tape had exactly similar physical parameters made the same material except that each an opposite twist resulted clockwise anticlockwise flow swirl, i.e., left turn right turn, respectively. type ratio 4 5.5 on 180° twist. The tapes tested tube-in-tube exchanger having 2 m length. in...

Journal: :Journal of clinical microbiology 2014
Angela R Branche Edward E Walsh Maria A Formica Ann R Falsey

Respiratory tract infections (RTI) frequently cause hospital admissions among adults. Diagnostic viral reverse transcriptase PCR (RT-PCR) of nose and throat swabs (NTS) is useful for patient care by informing antiviral use and appropriate isolation. However, automated RT-PCR systems are not amenable to utilizing sputum due to its viscosity. We evaluated a simple method of processing sputum samp...

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