Stabilization characteristics and mechanisms in a novel tubular flame burner with localized stratified property

Ren, Shoujun; Yang, Haolin; Jiang, Liqiao; Zhao, Daiqing; Wang, Xiaohan

doi:10.1016/j.energy.2020.117235

Cited by 18 publications

(16 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculation model has been verified in our previous works. [16][17][18] The flow field, temperature distribution, and CH distribution are in good agreement with the experimental results. Besides, numerical simulation by using Chemkin-PRO 22 (15131) is adopted to examine the flame speed and combustion temperature under different oxygen mole fractions β and equivalence ratio φ.…”

Section: Experimental and Numerical Methodssupporting

confidence: 79%

“…A detailed mechanism for methane 21 that contains the main species of CH 4 , O 2 , CH 3 , CH 2 , OH, CO, H 2 , CO 2 , and H 2 O is employed in this investigation. The calculation model has been verified in our previous works 16‐18 . The flow field, temperature distribution, and CH distribution are in good agreement with the experimental results.…”

Section: Experimental and Numerical Methodssupporting

confidence: 72%

“…The CFD results about the flow field have been verified in our previous works, 16‐18,25 showing high reliability. The calculated results of Da numbers are shown in Table 1.…”

Section: Discussionsupporting

confidence: 64%

“…The nonpremixed condition, such as LSVC, can provide a suitable equivalence ratio and greatly improve combustion stability, thereby making the blow‐out more difficult 15 . In the LSVC, the fuel and oxidant are injected in the same side tangential direction, which will form a nonuniform component distribution, thus yielding a large stability limit 16‐18 …”

Section: Introductionmentioning

confidence: 99%

“…15 In the LSVC, the fuel and oxidant are injected in the same side tangential direction, which will form a nonuniform component distribution, thus yielding a large stability limit. [16][17][18] Therefore, to improve the application range of oxygen-enriched combustion and suppress the adverse effect of the premixed condition in the typical vortex-tube combustors, it is necessary to improve the combustor structure. Based on the above considerations, an axial fuel injection swirl tube combustor is proposed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Stabilization performances and mechanisms of a diffusion‐like vortex‐tube combustor foroxygen‐enrichedcombustion

et al. 2020

Self Cite

View full text Add to dashboard Cite

Summary The stabilization performance and mechanisms in a diffusion‐like vortex‐tube combustor is investigated for oxygen‐enriched combustion. The stability limit, flame configuration, and pressure fluctuation are investigated under various conditions. Results show that a diffusion‐like flame structure is established in the combustor and the nonpremixed peculiarity becomes more prominent with the increase of oxygen mole fraction. The steady combustion can be achieved in the range of global equivalence ratio 0.01 to 1.0 with a low‐pressure fluctuation amplitude always less than 1300 Pa, indicating a good combustion stability of this combustor. Additionally, the stabilization mechanism is discussed from the time matching and velocity matching. Based on the axial fuel entry method, the Damköhler number (Da) is always less than 1.0 as a whole, which is the principal reason for the tubular flame shape and the steady combustion procedure in this vortex‐tube combustor. The intensified combustion under oxygen‐enriched combustion can increase the flame speed, and subsequently reduce the mixing quality and make the yellow flame more visible. Besides, the temperature distribution and the flow field structure can explain the corrugation and deformation of the flame front under oxygen‐enriched conditions.

show abstract

Section: Experimental and Numerical Methodssupporting

confidence: 79%

Section: Experimental and Numerical Methodssupporting

confidence: 72%

“…The CFD results about the flow field have been verified in our previous works, 16‐18,25 showing high reliability. The calculated results of Da numbers are shown in Table 1.…”

Section: Discussionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations