Effect of Using Combined Square Nozzle & winglet with Helical Tape on Thermal Characteristics in Tube Heat Exchanger

Hisham Assi Hoshi; Israa S. Ahmed; Abdulmunem R. Abdulmunem

Article Details

Effect of Using Combined Square Nozzle & winglet with Helical Tape on Thermal Characteristics in Tube Heat Exchanger

Authors:

Hisham Assi Hoshi | Israa S. Ahmed | Abdulmunem R. Abdulmunem

Publisher:

University of Baghdad

Journal:

Al-Khwarizmi Engineering Journal Vol.14 Issue 4, pp.64-71

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001539453

pISSN:

2312-0789

Keywords:

Abstract:

 Influence of combined square nozzle with helical tape inserted in a constant heat flux tube on heat transfer enhancement for turbulent airflow for Reynolds number ranging from 7000 to 14500 were investigated experimentally. Three different pitch ratios for square nozzle (PR = 5.8, 7.7 and 11.6) according to three different numbers of square nozzle (N = 3, 4 and 5) and constant pitch ratios for helical tape were used. The results observed that the Nusselt number and friction factor for combination with winglets were found to be up to 33.8 % and 21.4 %, respectively higher than nozzle alone for pitch ratio PR=5.8. The maximum value of thermal performance for using combination with winglets was about 1.351 for pitch ratio= 5.8. Nusselt number and friction factor correlations from experimental data were developed for turbulent flow.

Article Details

Effect of Using Combined Square Nozzle & winglet with Helical Tape on Thermal Characteristics in Tube Heat Exchanger

Authors:

Hisham Assi Hoshi | Israa S. Ahmed | Abdulmunem R. Abdulmunem

Publisher:

University of Baghdad

Journal:

Al-Khwarizmi Engineering Journal Vol.14 Issue 4, pp.64-71

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001539453

pISSN:

2312-0789

Heat transfer enhancement

thermal performance

turbulators

winglets

Issues

Article Details

Effect of Using Combined Square Nozzle & winglet with Helical Tape on Thermal Characteristics in Tube Heat Exchanger

Authors: Hisham Assi Hoshi | Israa S. Ahmed | Abdulmunem R. Abdulmunem

Publisher: University of Baghdad

Journal: Al-Khwarizmi Engineering Journal Vol.14 Issue 4, pp.64-71

Document Type: Article

Publication Date: 1/2018

Document Language: English

Document ID (Org No.): 2001539453

pISSN: 2312-0789

Heat transfer enhancement

thermal performance

turbulators

winglets

Issues

Authors:

Hisham Assi Hoshi | Israa S. Ahmed | Abdulmunem R. Abdulmunem

Publisher:

University of Baghdad

Journal:

Al-Khwarizmi Engineering Journal Vol.14 Issue 4, pp.64-71

Document Type:

Article

Publication Date:

1/2018

Document Language:

English

Document ID (Org No.):

2001539453

pISSN:

2312-0789