Experimental investigation of the velocity field in a liquid ring in a liquid-ring vacuum-pump

1972 ◽  
Vol 8 (2) ◽  
pp. 134-137 ◽  
Author(s):  
I. A. Raizman ◽  
�. B. Mats
Keyword(s):  
Experimental Investigation ◽  
Velocity Field ◽  
Vacuum Pump ◽  
Liquid Ring

Design of Liquid-Ring Vacuum Pump with Adjustable Degree of Internal Compression

2021 ◽  
Author(s):  
Yu. V. Rodionov ◽  
Yu. T. Selivanov ◽  
D. V. Nikitin ◽  
M. A. Mahmood ◽  
N. V. Mikheev
Keyword(s):  
Vacuum Pump ◽  
Liquid Ring

scholarly journals Experimental investigation of the Multipoint Ultrasonic Flowmeter

2018 ◽  
Vol 180 ◽  
pp. 02026
Author(s):  
Filipský Jakub
Keyword(s):  
Experimental Investigation ◽  
Vector Field ◽  
Velocity Field ◽  
Computer Simulations ◽  
Correlation Method ◽  
Ultrasonic Flowmeter ◽  
Ultrasonic Measurements ◽  
Parasitic Effects ◽  
Achievable Accuracy ◽  
Three Components

The Multipoint Ultrasonic Flowmeter is a vector tomographic device capable of reconstructing all three components of velocity field based solely on boundary ultrasonic measurements. Computer simulations have shown the feasibility of such a device and have been published previously. This paper describes an experimental investigation of achievable accuracy of such a method. Doubled acoustic tripoles used to obtain information of the solenoidal part of vector field show extremely short differences between the Time Of Flights (TOFs) of individual sensors and are therefore sensitive to parasitic effects of TOF measurements. Sampling at 40MHz and correlation method is used to measure the TOF.

Numerical and Experimental Investigation of Airflow through Check Valve of Vacuum Pump for Automotive Application

2011 ◽  
Author(s):  
H Pandarinath ◽  
J Sureshkumar ◽  
Ramalingam Sivanantham ◽  
S Prabhakar ◽  
S R Nagendiran
Keyword(s):  
Experimental Investigation ◽  
Check Valve ◽  
Vacuum Pump ◽  
Automotive Application

scholarly journals Experimental investigation of longitudinal space–time correlations of the velocity field in turbulent Rayleigh–Bénard convection

2011 ◽  
Vol 683 ◽  
pp. 94-111 ◽  
Author(s):  
Quan Zhou ◽  
Chun-Mei Li ◽  
Zhi-Ming Lu ◽  
Yu-Lu Liu
Keyword(s):  
Experimental Investigation ◽  
Velocity Field ◽  
Space Time ◽  
Turbulent Shear ◽  
Convection Cell ◽  
Mean Velocity ◽  
Bénard Convection ◽  
Benard Convection ◽  
Rayleigh Benard Convection ◽  
Rayleigh Benard

AbstractWe report an experimental investigation of the longitudinal space–time cross-correlation function of the velocity field, $C(r, \tau )$, in a cylindrical turbulent Rayleigh–Bénard convection cell using the particle image velocimetry (PIV) technique. We show that while Taylor’s frozen-flow hypothesis does not hold in turbulent thermal convection, the recent elliptic model advanced for turbulent shear flows (He & Zhang, Phys. Rev. E, vol. 73, 055303) is valid for the present velocity field for all over the cell, i.e. the isocorrelation contours of the measured $C(r, \tau )$ have an elliptical curve shape and hence $C(r, \tau )$ can be related to $C({r}_{E} , 0)$ via ${ r}_{E}^{2} = (r\ensuremath{-} U\tau )^{2} + {V}^{2} {\tau }^{2} $ with $U$ and $V$ being two characteristic velocities. We further show that the fitted $U$ is proportional to the mean velocity of the flow, but the values of $V$ are larger than the theoretical predictions. Specifically, we focus on two representative regions in the cell: the region near the cell sidewall and the cell’s central region. It is found that $U$ and $V$ are approximately the same near the sidewall, while $U\simeq 0$ at the cell centre.

scholarly journals Prospects of using a liquid ring vacuum pump with automatic adjustable discharge window when grinding grape seeds and pomace

2021 ◽  
pp. 55-60
Author(s):  
Юрий Юрьевич Родионов ◽  
Анастасия Игоревна Скоморохова ◽  
Юрий Викторович Родионов ◽  
Дмитрий Вячеславович Никитин ◽  
Сергей Иванович Данилин ◽  
...  
Keyword(s):  
Vacuum Pump ◽  
Grape Pomace ◽  
Biologically Active ◽  
Specific Power ◽  
Industrial Complex ◽  
Grape Seeds ◽  
Two Stage ◽  
Plant Products ◽  
Plant Powders ◽  
Liquid Ring

Для повышения сохранения биологически активных веществ, уменьшения энергопотребления в процессе измельчения и получения порошка заданной степени помола из виноградных выжимок и семян предлагается использование установки двухступенчатой дисково-шаровой вакуумной мельницы. Предложенная конструкция двухступенчатой мельницы оказывает влияние на безопасность работы (исключаются взрывы) и экологичность (не создает запыленности окружающей среды). В конструкции разработанной установки важным объектом является вакуумный насос. Приведены устройство и основные принципы работы классического одноступенчатого водокольцевого вакуумного насоса производства ОАО «БЕСКОМ» и жидкостно-кольцевого вакуумного насоса с возможностью автоматического регулирования размеров нагнетательного окна, разработанного в ФГБОУ ВО «ТГТУ» на кафедре «МИГ». Показаны основные преимущества предлагаемого насоса по сравнению с классическим вариантом. На основе испытаний был проведен сравнительный анализ разработанного жидкостно-кольцевого вакуумного насоса с автоматическим регулируемым размером нагнетательного окна и классического вакуумного насоса равной быстроты действия, результаты которого продемонстрировали существенную эффективность использования первой машины. Установлено, что затраты удельной мощности в процессе транспортирования растительных порошков на 20-25% ниже при равной быстроте действия. Экономический расчет демонстрирует эффективность применения новой конструкции разработанного вакуумного насоса в технологическом процессе тонкого измельчения сухих растительных продуктов за счет вакуумного отвода заданной фракции помола. Поэтому разработанный насос рекомендуется использовать для измельчения сухих сыпучих растительных продуктов на крупных перерабатывающих предприятиях агропромышленного комплекса, пищевой, фармацевтической и парфюмерной отраслях промышленности. To increase the preservation of biologically active substances, reduce energy consumption in the grinding process and obtain a powder of a given degree of grinding from grape pomace and seeds, it is proposed to use a two-stage disk-ball vacuum mill. The proposed design of a two-stage mill affects the safety of work (excluding explosions) and environmental friendliness (does not create a dusty environment). An important object in the design of the developed installation is the vacuum pump. The device and basic principles of operation of a classic single-stage liquid ring vacuum pump manufactured by JSC "BESCOM" and a liquid ring vacuum pump with the ability to automatically adjust the size of the discharge window, developed at the TSTU Department of MIG are presented. The main advantages of the proposed pump in comparison with the classic version are shown.Based on the tests, a comparative analysis of the developed liquid ring vacuum pump with an automatically adjustable discharge window size and a classical vacuum pump of equal action speed was carried out, the results of which demonstrated the significant efficiency of using the first machine. It has been established that the specific power consumption in the process of transporting plant powders is 20-25% lower with the same speed of action. An economic calculation demonstrates the effectiveness of using a new design of the developed vacuum pump in the technological process of fine grinding of dry plant products due to the vacuum removal of a given grinding fraction. Therefore, the developed pump is recommended to be used for grinding dry bulk plant products at large processing enterprises of the agro-industrial complex, food, pharmaceutical and perfumery industries.

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