Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle
Critical flow Venturi nozzles (toroidal, cylindrical, convergent–divergent, or C–D) nozzles) have discharge coefficients predicted through numerical and experimental investigations. Unfortunately, the imprecision of the critical-flow Venturi nozzle design makes it impossible to study the influenc...
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Isfahan University of Technology
2025-05-01
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| Series: | Journal of Applied Fluid Mechanics |
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| Online Access: | https://www.jafmonline.net/article_2664_be35453560e9c5c4ab07b400c774e9b6.pdf |
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| author | F. A. Kassem A. A. Zahran M. Adel |
| author_facet | F. A. Kassem A. A. Zahran M. Adel |
| author_sort | F. A. Kassem |
| collection | DOAJ |
| description | Critical flow Venturi nozzles (toroidal, cylindrical, convergent–divergent, or C–D) nozzles) have discharge coefficients predicted through numerical and experimental investigations. Unfortunately, the imprecision of the critical-flow Venturi nozzle design makes it impossible to study the influence of inlet curvature Rc on the discharge coefficient in the laminar boundary layer area. This study examines how the inlet curvature affects the discharge coefficient, or Cd, in the laminar boundary layer area of a critical-flow Venturi nozzle with a cylindrical throat and toroidal shape. The inlet curvature has a range from one throat diameter to three and a half throat diameters. This range of inlet curvatures was obtained by throat the inlet of a high-precision nozzle that was primarily compliant with ISO 9300. The C-D nozzle showed the impact of the convergence angle on the discharge coefficient. The results showed that the highest discharge coefficient occurs at Rc= 2dth for a throat diameter of 0.5588 mm, whereas for dth= 3.175 mm, it occurs at Rc= 2.5dth for toroidal nozzle. For this C-D nozzle, the highest discharge coefficient was observed to occur at a curvature of angle of 10°. Moreover, Cd increases significantly with increase of inlet stagnation pressure but with a small throat diameter. |
| format | Article |
| id | doaj-art-b51ae4e1b67642f1aeed0b6a81e5b18c |
| institution | Kabale University |
| issn | 1735-3572 1735-3645 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj-art-b51ae4e1b67642f1aeed0b6a81e5b18c2025-08-20T03:53:21ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452025-05-011871669168210.47176/jafm.18.7.32942664Study of Effect of Convergence Section Geometric on the Performance of a Sonic NozzleF. A. Kassem0A. A. Zahran1M. Adel2Volume and Fluid Flow Metrology Laboratory, Mass and Force Division, National Institute of Standards (NIS), Giza 12211, EgyptVolume and Fluid Flow Metrology Laboratory, Mass and Force Division, National Institute of Standards (NIS), Giza 12211, EgyptMechanical Power Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, EgyptCritical flow Venturi nozzles (toroidal, cylindrical, convergent–divergent, or C–D) nozzles) have discharge coefficients predicted through numerical and experimental investigations. Unfortunately, the imprecision of the critical-flow Venturi nozzle design makes it impossible to study the influence of inlet curvature Rc on the discharge coefficient in the laminar boundary layer area. This study examines how the inlet curvature affects the discharge coefficient, or Cd, in the laminar boundary layer area of a critical-flow Venturi nozzle with a cylindrical throat and toroidal shape. The inlet curvature has a range from one throat diameter to three and a half throat diameters. This range of inlet curvatures was obtained by throat the inlet of a high-precision nozzle that was primarily compliant with ISO 9300. The C-D nozzle showed the impact of the convergence angle on the discharge coefficient. The results showed that the highest discharge coefficient occurs at Rc= 2dth for a throat diameter of 0.5588 mm, whereas for dth= 3.175 mm, it occurs at Rc= 2.5dth for toroidal nozzle. For this C-D nozzle, the highest discharge coefficient was observed to occur at a curvature of angle of 10°. Moreover, Cd increases significantly with increase of inlet stagnation pressure but with a small throat diameter.https://www.jafmonline.net/article_2664_be35453560e9c5c4ab07b400c774e9b6.pdftoroidal sonic nozzlecurvature radiusstagnation pressuredischarge coefficientconvergent- divergent nozzle |
| spellingShingle | F. A. Kassem A. A. Zahran M. Adel Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle Journal of Applied Fluid Mechanics toroidal sonic nozzle curvature radius stagnation pressure discharge coefficient convergent- divergent nozzle |
| title | Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle |
| title_full | Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle |
| title_fullStr | Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle |
| title_full_unstemmed | Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle |
| title_short | Study of Effect of Convergence Section Geometric on the Performance of a Sonic Nozzle |
| title_sort | study of effect of convergence section geometric on the performance of a sonic nozzle |
| topic | toroidal sonic nozzle curvature radius stagnation pressure discharge coefficient convergent- divergent nozzle |
| url | https://www.jafmonline.net/article_2664_be35453560e9c5c4ab07b400c774e9b6.pdf |
| work_keys_str_mv | AT fakassem studyofeffectofconvergencesectiongeometricontheperformanceofasonicnozzle AT aazahran studyofeffectofconvergencesectiongeometricontheperformanceofasonicnozzle AT madel studyofeffectofconvergencesectiongeometricontheperformanceofasonicnozzle |