Swirl Ratio (SR) VS. Swirl (1/min)

Fluent learner · June 18, 2016, 16:01

Hi
What is the relation or formula between Swirl Ratio and Swirl(1/min)?
If i have SR how can i calculate Swirl(1/min)
Thanks

MFGT · June 20, 2016, 06:37

Hi,

swirl ratio is defined as omega3/omega_crankshaft

omega3 is the angular velocity around center of mass in z direction, which i guess is what you want to have as Swirl (1/min).

omega_crankshaft (1/min) should be defined as 2*PI*rpm, so this is what you need to multiply your SR with.

See Eq. 22.2 of the Theory manual for futher information.

Fluent learner · June 20, 2016, 08:43

Quote:

Originally Posted by MFGT

Hi,

swirl ratio is defined as omega3/omega_crankshaft

omega3 is the angular velocity around center of mass in z direction, which i guess is what you want to have as Swirl (1/min).

omega_crankshaft (1/min) should be defined as 2*PI*rpm, so this is what you need to multiply your SR with.

See Eq. 22.2 of the Theory manual for futher information.

maybe....nice....

June 18, 2016, 16:01	Swirl Ratio (SR) VS. Swirl (1/min)	#1
Fluent learner Member Join Date: Aug 2014 Posts: 31 Rep Power: 11	Hi What is the relation or formula between Swirl Ratio and Swirl(1/min)? If i have SR how can i calculate Swirl(1/min) Thanks

June 20, 2016, 06:37		#2
MFGT Senior Member Tobias Join Date: May 2016 Location: Germany Posts: 264 Rep Power: 10	Hi, swirl ratio is defined as omega3/omega_crankshaft omega3 is the angular velocity around center of mass in z direction, which i guess is what you want to have as Swirl (1/min). omega_crankshaft (1/min) should be defined as 2PIrpm, so this is what you need to multiply your SR with. See Eq. 22.2 of the Theory manual for futher information. Fluent learner likes this.

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