Journal of Astronautics , ; 2. : (2007) Navier2Stokes, T = T w + ( T aw - T w ) guπu e rgu 2 ΠCp 1.

Transcription

1 Journal of Astronautics Vol. 28 No. 3 May ( ; ) : Π : ; Π ; : V211 : A : (2007) Π 1. 1 Π Π [1-5 ] Navier2Stokes Roe FDS B2L Chien k2 B2L [7 ] [8 ] 1. 2 [9 ] Blasius N2S Roe [10 Crocco ] : T = T w + ( T aw - T w ) guπu e rgu 2 ΠCp : T ; T w ; T aw ; r ; gu ; u e ] ; Cp Π 1. 3 [9 ] : ; : : ( ) ; ( )

2 3 : 599 1a M j = 3 = 6mm d 0 1b x y (1a ) 1c 1 2 Fig. 2 Definitions of the flowfields structures 1 a b c Fig. 1 The model and coordinates 1 Table 1 The computational parameters T 0 M ( K) (mm) M j T 0j ( K) P j ΠP Re (1Πm) [4 ] B2L k2 (CH) 3a 3b ( = 0 ) ; ( = 180 ) ; ( = 90 ) (3b ) 2 = ( 1c) ; 3a ( = ) ( M = 3. 5) ] Fig. 3a Pressure distributions along the symmetrical line ; ; 2 Hs ; 3b = 90 ( M = 3. 5) Hm ; Ls Fig. 3b Pressure distributions along line= 90 ; Lw

3 Ma = ) k2 4a 4b B2L ( = ( = 0 ) ( = 90 ) 4a ( = ) ( M = 5. 0) Fig. 4a Pressure distributions along the symmetrical line ( M = 5) 4b = 90 ( M = 5. 0) Fig. 4b Pressure distributions along line = 90 ( M = 5) B2L B2L B2L ] Ma = a 5b 5a Fig. 5a Pressure contours in symmetrical plane by CFD( M = 5) 5b Fig. 5b Schlieren photo by test( M = 5) PΠP = ( ] M = 5) Fig. 6 Comparison of surface streamlines by computation and PΠP < oil flow pattern by test( M = 5) P - P +

4 3 : Fig. 7 Interactive region on the surface of plate( M = 5) P j ΠP = P j ΠP = P j ΠP = a 8b B2L ( = ) = 90 ( = a 9b P j ΠP ; ; ; ( ) 180 ) 9a P j ΠP = Fig. 9a Spatial streamlines and pressure contours ( M = 5. 0 P j ΠP = 12. 4) 8a ( = ) ( M = 5. 0) Fig. 8a Pressure distributions along the symmetrical line 9b P j ΠP = Fig. 9b Spatial streamlines and pressure contours ( M = 5. 0 P j ΠP = 68. 3) 8b = 90 ( M = 5. 0) Fig. 8b Pressure distribution along= 90 line 9 8 2

5 : Ls Lw ( Hs ) ( Hm ) ] 2 ( M = 5. 0 M j = 3. 0) Table 2 Effections of pressure ratio on structural characteristics of interaction flowfieds( M = 5. 0 M j = 3. 0) interaction[ C]. AIAA P j ΠP [ 5 ] Ni Z Y Li S X Sun Y T. Visualization of pressure contour and oil LsΠd flow pattern on interactive flowfield[ C]. The 7 th Asian Symposium on LwΠd visualization Singapore 2003 HsΠd [ 6 ]. [ D ]. HmΠd [ WANG Jun2qi. Numerical study of :Π transverse jets interaction flowfields[d]. Ph. D. Beijing University of 3 (1) Π [ 9 ] (2) (3) [ 1 ] Zukoski E E Spaid F W. Secondary injection of gases into superson2 ic flow[j ]. AIAA Journal (10) : [ 2 ] Werle MJ Driftmyer R T Shaffer D G. Jet2interaction2induced sep2 aration : Two2dimensional problem [ J ]. AIAA Journal (2) : [ 3 ] Clement P Rodriguez C. Shock wave structure and penetration height in transverse jets[ C]. AIAA [ 4 ] Dash S M et al. Turbulent effects on missile lateral controlπdivert jet Aeronautics & Astronautic 2005 ] [ 7 ] Baldwin B Lomax H. Thin layer approximation and algebraic model for separated turbulent flows[ C]. AIAA [ 8 ]. [J ] (4) : [ WANG Jun2qi LI Su2 xun SUN Mao. Numerical simulation of lateral jet interaction turbu2 lent flowfield[j ]. Acta Aerodynamics Sinica (4) : ]. [ D ]. 2005[ Study of Complex Flowfields Structures In2 duced by Transverse Jet. Ni zhaoyong flowfields[ D ]. Ph. D. China Academy of Aerospace and Aerodynamics 2005 ] [10 ] Kuethe A M Chow C Y. Foundations of Aerodynamics : Bases of Aerodynamic Design[M]. John Wiley & Sons 1976 : ( ) : (100083) E2mail edu. cn Numerical Simulation of Characteristics of Supersonic Jet Interaction Flowfields WANGJun2qi 1 LI Su2xun 2 NI Zhao2yong 2 SUN Mao 1 (1. Aeronautics Academy of Science and Engineering Beijing University ofaeronautics & Astronautic Beijing China ; 2. China Academy of Aerospace and Aerodynamics Beijing China) Abstract :The interaction flowfields induced by lateral supersonic single jet mounted on a flat plate had been described by nu2 merical simulation in this paper. The method was validated by experimental results including the pressure distributions around the jet ; and schlieren photo in which the shock wave structures had been expressed ; and the oil flow pattern which shown the separa2 tion region. The surface and spatial structures of interaction flowfields are revealed in detail. The influences of pressure ratio on the structures and characteristics are analyzed. Key words : Lateral jet ; SuperΠhyper sonic flow ; Turbulence model