Abstract
The present study considers multiple tandem jets in cross flow under an injection ratio less than 1. The jets are emitted through 60°-inclined, 8 mm-diameter cylindrical nozzles that are razed at different levels from the ground of the working wind tunnel. The understanding of this configuration is likely to provide a good support for the comprehension of more complicated and then real situations. The main objective of this paper consists of the exploration of the different flow structures induced by the emitted jets with the oncoming mainstream in one hand, and with each other and the different domain boundaries on the other hand. A particular attention is dedicated to the established flow field and the induced vortical structures. It is mainly observed that an injection rate inferior to 1 promotes the jets’ flattening and even more the rear jet. A higher injection height, on the other hand, operates differently by providing the jets with a further impulse to cross deeper and higher the mainstream and stay away from the ground attachment effect.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Froust J, Rockwell D (2007) Flow structure associated with the multiple jets from a generic catheter tip. Exp Fluids 42:513–530. https://doi.org/10.1007/s00348-006-0249-z
Jordinson R (1958) Flow in a jet directed normal to the wind. R and M No. 3074, Brit. A R C
Gordier RL (1959) Studies on fluid jets discharging normally into moving liquid. St Anthony Falls Hyd Lab, Tech Paper, No 28, Series B
Ziegler H, Wooler PT (1971) Multiple jets exhausted into a crossflow. J Aircr 8(6):414–420
Ziegler H, Wooler PT (1973) Analysis of stratified and closely spaced jets exhausting into a crossflow. National Aeronautics and space Administration, Washington, DC
Walker R E, Kors D L, (1973) Multiple Jet Study. Technical Report, NASA-CR-121217; NAS 1.26:121217
Sterland PR, Hollingsworth MA (1975) An experimental study of multiple jets directed normally to a cross-flow (for turbojet afterburner flameholder design). J Mech Eng Sci 17:117–124
Isaac KM, Jakubowski AK (1985) Experimental study of the interaction of multiple jets with a cross flow. AIAA Journal 23(11):1679–1683. https://doi.org/10.2514/3.9151
Ligrani PM, Lee JS (1996) Film Cooling from a Single Row of Compound Angle Holes at High Blowing Ratios. Int J Rotating Mach 2:259–267
Yu D, Ali MS, Lee JHW (2006) Multiple tandem jets in cross-flow. J Hyd Eng 132:971–982
Chen P, Li S, Luo S, Ni Z (2014) Flow visualization on lateral multiple jet interaction with freestream. J Flow Control Meas Visulization 2:7–11. https://doi.org/10.4236/jfcmv.2014.21002
Radhouane A, Mahjoub Saïd N, Mhiri H, Bournot Ph, Le Palec G (2016) Twin inclined jets in crossflow: experimental investigation of different flow regimes and jet elevations. Environ Fluid Mech 16:45–67. https://doi.org/10.1007/s10652-015-9410-7
Briggs GA (1974) Plume rise from multiple sources. In: Proceedings of cooling tower environment held at University of Maryland. pp 161–179
Briggs GA (1975) Plume rise predictions. Lectures on air pollution and environmental impact analysis, pp 59–I 11
Anfossi D, Bonino G, Bossa F, Richiardone R (1978) Plume rise from multiple sources: a new model. Atmos Environ 12:1821–1826
Radhouane A, Bournot H, Mahjoub Saïd N, Mhiri H, Le Palec G (2009) Numerical and experimental study of a double jet inclination variation on its dynamic evolution within a crossflow. Heat Mass Transf J 45(12):1597–1616
Radhouane A, Mahjoub Saïd N, Mhiri H, Le Palec G, Bournot P (2009) Impact of the initial streamwise inclination of a double jet emitted within a cool crossflow on its temperature field and pollutants dispersion. Heat Mass Transf J 45(6):805–823
Radhouane A, Mahjoub Saïd N, Mhiri H, Le Palec G, Bournot P (2010) Impact of the temperature gradient between twin inclined jets and an oncoming crossflow on their resulting heat transfer. J Comput Therm Sci (CTS-1071) 2(6):pp. 487–499
Radhouane A, Bhouri Baouab I, Mahjoub Saïd N, Mhiri H, Le Palec G, Bournot P (2013) Temperature impact on the turbulence generated by the interaction of twin inline inclined jets in crossflow. Heat Mass Transf 49:629–656
Kelso RM, Lim TT, Perry AE (1996) An experimental study of round jets in cross-flow. J Fluid Mech 306:111–144
Fric TF, Roshko A (1994) Vortical structure in the wake of a transverse jet. J Fluid Mech 279:1–47
Andreopoulos J, Rodi W (1984) Experimental investigation of jets in a crossflow. J Fluid Mech 138:93–127
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 Springer Nature Switzerland AG
About this paper
Cite this paper
Radhouane, A., Mahjoub Said, N., Mhiri, H., Bournot, P. (2020). Dynamics of the Flow Field Induced by Multiple Elevated Jets in Crossflow. In: Aifaoui, N., et al. Design and Modeling of Mechanical Systems - IV. CMSM 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-27146-6_13
Download citation
DOI: https://doi.org/10.1007/978-3-030-27146-6_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-27145-9
Online ISBN: 978-3-030-27146-6
eBook Packages: EngineeringEngineering (R0)