Silové účinky makro-nestability toku na radiální narážky v míchacích nádobách s míchadly se šikmo skloněnými lopatkami nebo s Rushtonovou turbinou

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F04%3A00011064" target="_blank" >RIV/60461373:22340/04:00011064 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Force effects of the macro-instability of flow pattern on radial baffles in a stirred vessel with pitched-blade and Rushton turbine impellers

Popis výsledku v původním jazyce

Experimental data obtained in a flat-bottomed cylindrical mixing vessel stirred with pitched blade impellers (4 or 6 blades) or with a Rushton turbine impeller by measuring the tangential force affecting radial baffles are analyzed. The presence of the macro-instability (MI) related component of the force was detected by spectral analysisof measured data. A single MI-related component occurring with the frequency of about 0.074 N (N is the impeller speed) was detected for the pitched blade impellers. Twodistinct frequencies, both directly proportional to the impeller speed, were detected for the Rushton turbine impeller: a lower frequency of approximately 0.025 N and a higher frequency of about 0.085 N. The upper frequency occurred only at low ReM values. The lower frequency compone nt occurred over the entire ReM range. The dimensionless frequencies were independent of the stirring speed, the vertical position along the baffle, the number of impeller blades, and liquid viscosity. The

Název v anglickém jazyce

Force effects of the macro-instability of flow pattern on radial baffles in a stirred vessel with pitched-blade and Rushton turbine impellers

Popis výsledku anglicky

Experimental data obtained in a flat-bottomed cylindrical mixing vessel stirred with pitched blade impellers (4 or 6 blades) or with a Rushton turbine impeller by measuring the tangential force affecting radial baffles are analyzed. The presence of the macro-instability (MI) related component of the force was detected by spectral analysisof measured data. A single MI-related component occurring with the frequency of about 0.074 N (N is the impeller speed) was detected for the pitched blade impellers. Twodistinct frequencies, both directly proportional to the impeller speed, were detected for the Rushton turbine impeller: a lower frequency of approximately 0.025 N and a higher frequency of about 0.085 N. The upper frequency occurred only at low ReM values. The lower frequency compone nt occurred over the entire ReM range. The dimensionless frequencies were independent of the stirring speed, the vertical position along the baffle, the number of impeller blades, and liquid viscosity. The

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Research and Design - Part A

ISSN

0263-8762

e-ISSN

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Svazek periodika

82

Číslo periodika v rámci svazku

A9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1268-1281

Kód UT WoS článku

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EID výsledku v databázi Scopus

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