Based on these results and previous work (Deng et al., 2015) [12], a regime diagram is constructed that identifies the possible stabilization regimes: blow out, kinetically stabilized, autoignition-propagation-coupled stabilized, kinematically stabilized, and burner stabilized.
They must also span a dynamic operating envelope which allows the initiation of multi-modal (time varying) instabilities over a range of flame stabilization regimes.
Extended stabilization regimes, in terms of increasing boundary temperature, are therefore identified, including frozen flow, kinetically stabilized, autoignition propagation-coupled stautoignition propagation-coupleded, and burner stabilized regimes.
It is shown that the appropriate space to analyze the stabilization regimes of these swirling flames corresponds to a diagram based on Karlovitz and Lewis numbers.
Results show the existence of various types of flames, according to the classical gas jet to annular air flow velocity ratio, but the influence of the bluff-body shape on these stabilization regimes is also demonstrated.
Optical observations, including a schlieren method, revealed that two distinct flame stabilization and suppression regimes, i.e., (I) rim-attached and (II) wake-stabilized, appeared as the mean air velocity was increased.
After evaluating possible changes to flow rate, new values must be verified according to the stability criteria described in "Stabilization of the operating regime via throttle on the wellhead" section.
When a disturbance constitutes the dominant stressor, such as inundation, modification of existing disturbance regimes may increase invasion of the habitat (e.g. stabilization of river flow regimes in Australia favouring non-native species; Catford et al. 2011).
Results reveal that weak interactions can operate through two scale-dependent mechanisms: (i) under low local dispersal regimes, local stabilization of each community under weak interactions directly scales-up to global stability.
These behaviors include variability induced stabilization or enhancement of dynamic regimes, regions of sensitivity to dynamic regime transitions and existence of trap or escape regions.
