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ROW NUMBER EFFECTS ON THE HEAT TRANSFER PERFORMANCE OF IN-LINE FINNED TUBE BANKS.

Author(s) : RABAS T. J., HUBER F. V.

Type of article: Article

Summary

THE OUTSIDE HEAT TRANSFER COEFFICIENTS OF IN-LINE FINNED TUBE BANKS ARE ABOUT 0.7 TO 0.8 OF THOSE OF SIMILAR STAGGERED BANKS IF THE BANKS ARE DEEP AND THE REYNOLDS NUMBER IS LARGE. THE THERMAL PERFORMANCE OF A PARTICULAR IN-LINE TUBE BANK DECREASES WITH ROW NUMBER AND REACHES ABOUT 0.25 TO 0.35 OF THE STAGGERED VALUE WITH 7 TUBE ROWS. NEW DATA ARE ALSO PRESENTED, WHICH SHOW THAT STAGNATION REGIONS DEVELOP IN THE WAKES BEHIND THE TUBES IN THE FRONT ROWS BUT DO NOT DEVELOP DEEPER IN THE BUNDLE. IT IS APPARENT, THEN, THAT THE HEAT TRANSFER PERFORMANCE OF A PARTICULAR IN-LINE FINNED TUBE BANK FIRST DECREASES WITH ROW NUMBER, REACHES A MINIMUM VALUE THAT IS REYNOLDS NUMBER DEPENDENT, AND THEN INCREASES TO THE ASYMPTOTIC DEEP BANK VALUE.

Details

  • Original title: ROW NUMBER EFFECTS ON THE HEAT TRANSFER PERFORMANCE OF IN-LINE FINNED TUBE BANKS.
  • Record ID : 1990-2300
  • Languages: English
  • Source: Heat Transf. Eng. - vol. 10 - n. 4
  • Publication date: 1989
  • Document available for consultation in the library of the IIR headquarters only.

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