A numerical simulation of burning of pulverized peat fuel in a bidirectional vortex combustor

Criterion analysis and experimental study of combustion mechanisms in a bidirectional swirling flow and their relationship with pollutants emission

“…It is important to say that creating the bidirectional flow is one of the main properties of the swirling flow. The literature survey allows us to state that bidirectional swirling flows are characterized by a well‐developed stabilization area at the interface of flows moving in opposite directions, whereas the peripheral flow provides for convective wall cooling 23,24 …”

“…The literature survey allows us to state that bidirectional swirling flows are characterized by a well-developed stabilization area at the interface of flows moving in opposite directions, whereas the peripheral flow provides for convective wall cooling. 23,24 In bidirectional flows, a coaxial motion may be decomposed into two distinct flows: an outer annular flow directed toward the headwall of the combustor, and an inner core flow directed toward the end wall. 25 Both flows are swirling and rotate in the same direction but their axial velocity components are opposite in sign.…”

“…The bidirectional vortex combustors, implementing this principle of motion, have high efficiency and small sizes and are widely used in many fields, for example, aviation, 26 space, [27][28][29] and energy. 23,30 The analysis of the available theoretical and experimental results shows that analytical solution of the bidirectional vortex has been obtained in the papers, 31,32 as well as numerical and laboratory studies of bidirectional vortex engines and combustors have been carried out in many countries. [33][34][35][36][37][38] However, these studies do not suggest any generalization of the experimental data or criterion equations related to the description of the reacting bidirectional swirling flows.…”

“…Both flows are swirling and rotate in the same direction but their axial velocity components are opposite in sign. The bidirectional vortex combustors, implementing this principle of motion, have high efficiency and small sizes and are widely used in many fields, for example, aviation, 26 space, 27‐29 and energy 23,30 …”