Experimental investigation of fine-grained settling slurry flow behaviour in inclined pipe sections

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F19%3A00504067" target="_blank" >RIV/67985874:_____/19:00504067 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0295775" target="_blank" >http://hdl.handle.net/11104/0295775</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/johh-2018-0039" target="_blank" >10.2478/johh-2018-0039</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental investigation of fine-grained settling slurry flow behaviour in inclined pipe sections

Popis výsledku v původním jazyce

For the safe and economical design and operation of freight pipelines it is necessary to know slurry flow behaviour in inclined pipe sections, which often form significant part of pipelines transporting solids. Fine-grained settling slurry was investigated on an experimental pipe loop of inner diameter D = 100 mm with the horizontal and inclined pipe sections for pipe slopes ranging from -45 degrees to + 45 degrees. The slurry consisted of water and glass beads with a narrow particle size distribution and mean diameter d(50) = 180 mu m. The effect of pipe inclination, mean transport volumetric concentration, and slurry velocity on flow behaviour, pressure drops, deposition limit velocity, and concentration distribution was studied. The study revealed a stratified flow pattern of the studied slurry in inclined pipe sections. Frictional pressure drops in the ascending pipe were higher than that in the descending pipe, the difference decreased with increasing velocity and inclination. For inclination less than about 25 degrees the effect of pipe inclinations on deposition limit velocity and local concentration distribution was not significant. For descending pipe section with inclinations over -25 degrees no bed deposit was observed.

Název v anglickém jazyce

Experimental investigation of fine-grained settling slurry flow behaviour in inclined pipe sections

Popis výsledku anglicky

For the safe and economical design and operation of freight pipelines it is necessary to know slurry flow behaviour in inclined pipe sections, which often form significant part of pipelines transporting solids. Fine-grained settling slurry was investigated on an experimental pipe loop of inner diameter D = 100 mm with the horizontal and inclined pipe sections for pipe slopes ranging from -45 degrees to + 45 degrees. The slurry consisted of water and glass beads with a narrow particle size distribution and mean diameter d(50) = 180 mu m. The effect of pipe inclination, mean transport volumetric concentration, and slurry velocity on flow behaviour, pressure drops, deposition limit velocity, and concentration distribution was studied. The study revealed a stratified flow pattern of the studied slurry in inclined pipe sections. Frictional pressure drops in the ascending pipe were higher than that in the descending pipe, the difference decreased with increasing velocity and inclination. For inclination less than about 25 degrees the effect of pipe inclinations on deposition limit velocity and local concentration distribution was not significant. For descending pipe section with inclinations over -25 degrees no bed deposit was observed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA17-14271S" target="_blank" >GA17-14271S: Vliv sklonu potrubí na kritickou rychlost a rychlost skluzu heterogenní suspenze</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Hydrology and Hydromechanics

ISSN

0042-790X

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

113-120

Kód UT WoS článku

000463351400001

EID výsledku v databázi Scopus

2-s2.0-85064153757