Document Type
Conference Proceeding
Faculty
Faculty of Health, Engineering and Science
School
School of Engineering
RAS ID
16135
Abstract
Swirl is imparted into free and impinging nozzle flows as well as jet flames to affect convective heat transfer, fluid mixing or flame stability. At the nozzle exit plane, the emerging flow strongly influences downstream flow development and so factors which impact upon the emitted flow are worthy of study. This paper presents preliminary CFD analyses into the effect of design parameters and operational settings on the emerging flow at the exit plane for a swirl nozzle (Remax~30,500). The research was conducted in the premanufacture stage to optimise the nozzle. Swirl is aerodynamically generated using multiple tangential ports located upstream of the exit plane and the streamwise flow is augmented with flow from two axial ports located at the nozzle base. Before reaching the exitplane, all flows pass through a contraction en route to a straight section of length (L). Factors studied in this paper include the angle of (inlet) tangential ports, the total length of the straight section (L), the ratio of axial-to-tangential inflows and the Reynolds number. Results show that larger tangential port angles and a shorter straight section help develop a modestly greater
Access Rights
free_to_read
Comments
Thomas, B. K., Ahmed, Z. U., Al-Abdeli, Y. M., & Matthews, M. T. (2013). The Optimisation of a Turbulent Swirl Nozzle Using CFD. In Proceedings of the Australian Combustion Symposium (pp. 271-274). Sydney, Australia: Combustion Institute. Available here