Fuzzy Modeling of Performance of Counterflow Ranque-Hilsch Vortex Tubes with Different Geometric Constructions

• Published in: Numerical heat transfer. Part B, Fundamentals Vol. 54; no. 6; pp. 499 - 517
• Main Authors: Dincer, K., Tasdemir, S., Baskaya, S., Ucgul, I., Uysal, B. Z.
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 02-12-2008
• ISSN: 1040-7790; 1521-0626
• DOI: 10.1080/10407790802483432

In this article, we present the development of a fuzzy expert system (FES) for fuzzy modeling of the performance of counterflow Ranque-Hilsch vortex tubes for different geometric constructions. Experimental values were obtained from a detailed experimental investigation. With these experimental values, FES models of the Ranque-Hilsch vortex tube behavior were designed using the MATLAB 6.5 fuzzy logic toolbox in Windows XP running on an Intel 3.0-Ghz PC. For this process
P
,
N
,
ξ
, and
L
/
D
were chosen as input and Δ
T
h
, Δ
T
c
, Δ
T
as output parameters. FES results agree well with experimental data. It was found that the coefficient of multiple determination (
R
2
value) between the actual and fuzzy predicted data is Δ
T
h
 = 0.9801, the
R
2
value for Δ
T
c
values is 0.9841, and the
R
2
value for Δ
T
values is 0.9748.