Naima Krarraz^1,*, Amina Sabeur¹, Khadidja Safer², Ahmed Ouadha¹

FDMP-Fluid Dynamics & Materials Processing, Vol.20, No.1, pp. 79-96, 2024, DOI:10.32604/fdmp.2023.026238

Abstract Any biogas produced by the anaerobic fermentation of organic materials has the advantage of being an environmentally friendly biofuel. Nevertheless, the relatively low calorific value of such gases makes their effective utilization in practical applications relatively difficult. The present study considers the addition of hydrogen as a potential solution to mitigate this issue. In particular, the properties of turbulent diffusion jet flames and the related pollutant emissions are investigated numerically for different operating pressures. The related numerical simulations are conducted by solving the RANS equations in the frame of the Reynolds Stress Model in combination with the flamelet approach. Radiation… More > Graphic Abstract

Bing Liu¹, Yikun Chen¹, Huachen Liu¹, Qiao Wu¹, Minghui Wang¹, Jianlong Wan^2,*

Energy Engineering, Vol.119, No.2, pp. 815-826, 2022, DOI:10.32604/ee.2022.017988

Abstract The operating range of the flow rate or flow velocity for the micro-jet flame is quite wide, which can be used as the heat source. In order to optimize the micro-jet tube combustor in terms of the solid material, the present paper numerically investigates the impact of thermal conductivity (λ_s) on the operating limit of micro-jet flame. Unexpectedly, the non-monotonic blow-off limits with the increase of λ_s is found, and the corresponding generation mechanisms are analyzed in terms of the thermal coupling effect, flow field, and strain effect. At first, the lower preheating temperature of the fuel and larger heat… More >

Artur Tyliszczak*, Agnieszka Wawrzak

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.4, pp. 196-199, 2019, DOI:10.32604/icces.2019.05081

Abstract Efficiency of combustion processes is related to fuel-oxidizer mixing and interactions between a flame and a flow field. Their control can be achieved by passive and/or active techniques and may lead to considerable improvement in performance of various technological devices. Passive control involves manipulation of the flow by changing shape of the flow domains. Active control relies on manipulation of a flow field by an external forcing. The present study aims to give a deeper insight into the applicability of passive devices combined with active control strategy for mixing enhancement in jet type flames. We apply the passive control approach… More >