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Experimental investigation of the efficiency of gas screens at a burning-out surface with the blowing of a foreign gas

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Abstract

The article gives the results of a systematic experimental investigation of the efficiency of a gas screen at a burning-out graphite surface organized in different manners and with the blowing of a foreign gas into the boundary layer. In the experiments, the Reynolds number was varied within the limits RΔ ≈ 1.2·105 = 1.6·106, R* ≈ 100–2000, RZ = 2.3·102–1.5·104; the enthalpy factor of the nonisothermicity in the initial cross section varied from is/i0 = 1 with the tangential blowing of nitrogen to is/i0 ≈ 34 with the blowing of helium through the heated porous section.

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Literature cited

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    É. P. Volchkov, E. G. Zaulichnyi, A. I. Leont'ev, and E. I. Sinaiko, “Interaction between a graphite surface and a turbulent flow of gas under conditions of considerable nonisothermicity and in the presence of a screen of neutral gas,” Teplofiz. Vys. Temp.,8, No. 1 (1970).

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Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 1, pp. 59–64, January–February, 1974.

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Volchkov, É.P., Sinaiko, E.I. Experimental investigation of the efficiency of gas screens at a burning-out surface with the blowing of a foreign gas. J Appl Mech Tech Phys 15, 48–52 (1974). https://doi.org/10.1007/BF00850728

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Keywords

  • Nitrogen
  • Graphite
  • Mathematical Modeling
  • Boundary Layer
  • Enthalpy