Jet mixing of lobed nozzles with spoilers located at lobe peaks. (5th June 2017)

• Record Type: Journal Article
• Authors: Sheng, Zhi-qiang
• Is Part Of: Applied thermal engineering. Volume 119(2017)
• Page Start: 165
• Page End: 175
• Publication Date: 2017-06-05
• Subjects: NLN normal lobed nozzles -- SwALN sword alternating-lobe nozzle -- LSwALN SwALN with lobed peaks -- NSwALN SwALN with nail-like peaks; Jet mixing -- Lobed nozzle -- Lobe peak spoiler -- Heat and mass transfer -- Transverse flow; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2017.03.048
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Lobed and nail-like spoilers located at lobe peaks are introduced. The effect of lobe peak spoilers on nozzle performance is determined. The impact of lobe peak spoilers on jet mixing field is analysed. Lobed jet mixing is analysed with a focus on heat and mass transfer. Mixing is found to be dominated by large-scale heat and mass transfer. Abstract: Numerical investigation of the jet mixing of a sword alternating-lobe nozzle with lobed and nail-like spoilers located at the lobe peaks was conducted to analyse the effect of different lobe peak spoilers on the pumping ratio, mixing effectiveness, and total pressure recovery coefficient. It was found that suitable designed nail-like spoilers can improve the performance of a lobed nozzle adopted in infrared suppressors. It was concluded that the mixing is dominated by large-scale heat and mass transfer. It was suggested that a high performance lobed nozzle can be produced by optimising the large-scale heat and mass transfer in mixing process.