Understanding the role of flow dynamics in thermoacoustic combustion instability

J O'Connor - Proceedings of the Combustion Institute, 2023 - Elsevier
Thermoacoustic combustion instability is one of the most challenging operational issues in
several high-performance, low-emissions combustion technologies, including gas turbines …

A weakly nonlinear analysis of the precessing vortex core oscillation in a variable swirl turbulent round jet

K Manoharan, M Frederick, S Clees… - Journal of Fluid …, 2020 - cambridge.org
We study the emergence of precessing vortex core (PVC) oscillations in a swirling jet
experiment. We vary the swirl intensity while keeping the net mass flow rate fixed using a …

Dynamics and bifurcations of laminar annular swirling and non-swirling jets

CM Douglas, BL Emerson, TC Lieuwen - Journal of Fluid Mechanics, 2022 - cambridge.org
This paper presents bifurcation analyses characterising the nonlinear dynamics of fully
developed laminar annular jets with respect to the centrebody diameter is increased …

Hysteresis and turbulent vortex breakdown in transitional swirling jets

P Moise, J Mathew - Journal of Fluid Mechanics, 2021 - cambridge.org
Vortex breakdown (VB) in unconfined swirling jets occurs as either a bubble form of vortex
breakdown (BVB) or a conical form of vortex breakdown (CVB). This computational study …

[HTML][HTML] The NexGen burner: Non-Reacting gaseous and spray dynamics

M Kamin, J Eblin, P Khare - Physics of Fluids, 2023 - pubs.aip.org
This paper reports the results of a comprehensive investigation to identify turbulent
multiphase fluid dynamics through the NexGen burner used for fireworthiness certifications …

Nonlinear dynamics of fully developed swirling jets

CM Douglas, BL Emerson, TC Lieuwen - Journal of Fluid Mechanics, 2021 - cambridge.org
This paper characterises the steady and time-periodic behaviour of swirling jets using
numerical bifurcation analysis. Its objective is to elucidate the dynamics of fully developed …

An experimental study of the blue whirl onset

Y Yang, H Zhang, X Xia, P Zhang, F Qi - Proceedings of the Combustion …, 2023 - Elsevier
This paper focuses on the blue whirl's formation conditions and onset mechanism. The blue
whirl is experimentally generated using a forced-ventilation fire whirl apparatus, where the …

[HTML][HTML] Centrifugal waves in tornado-like vortices: Kelvin's solutions and their applications to multiple-vortex development and vortex breakdown

JML Dahl - Monthly Weather Review, 2021 - journals.ametsoc.org
Abstract About 140 years ago, Lord Kelvin derived the equations describing waves that
travel along the axis of concentrated vortices such as tornadoes. Although Kelvin's vortex …

Vortex breakdown in variable-density gaseous swirling jets

BW Keeton, J Carpio, KK Nomura… - Journal of Fluid …, 2022 - cambridge.org
Vortex breakdown in variable-density gaseous swirling jets Page 1 J. Fluid Mech. (2022), vol.
936, A1, doi:10.1017/jfm.2022.18 Vortex breakdown in variable-density gaseous swirling jets …

[HTML][HTML] Identification of coherent structures in distributed swirl-stabilized wet combustion

K Zhang, Y Shen, C Duwig - Fuel, 2021 - Elsevier
Towards achieving sustainable and decarbonized power, biomass to electricity is an
attractive pathway. To that end, the humidified gas turbine cycle is a promising technology …