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비뉴튼 유체에 대한 스크류형 교반기의 소요 동력에 관한 연구

Power Requirement of Helical Screw Agitators in Non-Newtonian Liquids of High Viscosity

노재영 이희철

Rho JY Lee HC

HWAHAK KONGHAK, June 1983, 21(3), 111-118(8), NONE

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Abstract

편심의 헬리컬 스크류 임펠러에 의해 교반될 때 고점도의 의소성 유체의 특성과 중요한 기하학적 변수들을 고려한 일반화된 소요동력식을 제시하였다. Chavan과 Ulbrecht들에 의해 제안된 소요동력식의 복잡성을 피하기 위해 c/d항의 효과를 무시한 식을 제안하였다. 이 식은 약 ±14 %의 오차가 있으며 레이놀즈수가 0.01에서 20까지의 범위내에서 얻어진 식이다. 이 관계식은 0.3<n<1 범위내에서 실험한 식이다.

A generalised power correlated equation has been developed to account for all the important factors such as geometrical variables and the shear-thining properties of highly viscous liquids when agitated by off-centered helical screw impellers. To avoid the complexity of power equation suggested by Chavan and Ulbrecht, a modified equation which is neglected effect of c/d term was suggested. This equation is verified within a deviation of ± 14 %.
The correlation has been obtained when the Reynolds number were in the range of 0.01 to 20.
The validity of the relation has been verified only in the range of 0.3<n<1.

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