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THE NORMAL SHOCK WAVES OF REAL GASES AND THE GENERALIZED ISENTROPIC EXPONENTS.

Author(s) : KOUREMENOS D. A.

Type of article: Article

Summary

WHEN A SUPERSONIC GAS FLOW IS CHOKED OR OTHERWISE DISTURBED, A SHOCK WAVE APPEARS. WHEN THIS SHOCK WAVE IS PERPENDICULAR TO THE DIRECTION OF THE ONE-DIMENSIONAL FLOW, A NORMAL SHOCK WAVE TRANSFORMS THE FLOW TO A SUBSONIC ONE. THE THERMODYNAMIC VARIABLES INVOLVED ARE: PRESSURE, SPECIFIC VOLUME, TEMPERATURE, ENTHALPY AND VELOCITY OF THE FLOW. TO DETERMINE THEIR VALUES AFTER THE NORMAL SHOCK, FIVE RELATIONS ARE USED, NAMELY, THE EQUATION OF STATE, ENTHALPY EQUATION, LAWS OF CONSERVATION OF IMPULSE AND ENERGY, AND CONTINUITY OF MASS. THE PRESENT WORK CONSIDERS TWO OTHER POSSIBILITIES, IE THE USE OF PERFECT GAS LIKE EQUATIONS DESCRIBING THE PHENOMENON OR THE USE OF THE REDLICH-KWONG EQUATION OF STATE. BOTH METHODS PRESENTED HERE REQUIRE THE NUMERICAL SOLUTION OF A ONE-VARIABLE EQUATION. IN THE FIRST METHOD THE VARIABLE IS THE MACH NUMBER WHILE IN THE SECOND THE SPECIFIC VOLUME.

Details

  • Original title: THE NORMAL SHOCK WAVES OF REAL GASES AND THE GENERALIZED ISENTROPIC EXPONENTS.
  • Record ID : 1986-2195
  • Languages: English
  • Source: Forsch. Ing.wes. - vol. 52 - n. 1
  • Publication date: 1986
  • Document available for consultation in the library of the IIR headquarters only.

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