CHAPTER 3: PHYSICAL EFFECT OF VITIATION ON SCRAMJET ...
CHAPTER 3: PHYSICAL EFFECT OF VITIATION ON SCRAMJET ...
CHAPTER 3: PHYSICAL EFFECT OF VITIATION ON SCRAMJET ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>PHYSICAL</strong> <strong>EFFECT</strong> <strong>OF</strong> <strong>VITIATI<strong>ON</strong></strong> <strong>ON</strong> <strong>SCRAMJET</strong> DESIGN<br />
Some species computed are reported in figures 16-17, beginning with water:<br />
35%<br />
30%<br />
25%<br />
20%<br />
15%<br />
10%<br />
5%<br />
mass fraction of H2O<br />
H2O-cas4<br />
H2O-cas6<br />
H2O-cas7<br />
H2O-cas8<br />
0%<br />
0,00 0,50 1,00 1,50 2,00 2,50<br />
Figure 16: Water mass fraction computed along the duct<br />
The equilibrium computations logically lead to 1% of NO in the hot gases, in the zone of the maximum<br />
static temperature (see figure 17):<br />
0,012<br />
0,01<br />
0,008<br />
0,006<br />
0,004<br />
0,002<br />
mass fraction of NO<br />
vitiated<br />
NO-cas4<br />
NO-cas6<br />
NO-cas7<br />
NO-cas8<br />
0<br />
0,00 0,50 1,00 1,50 2,00 2,50<br />
pure<br />
Figure 17: Computed NO along the duct<br />
The angles of the shock and the expansion fans could be slightly different in pure and vitiated flow, as it<br />
can be derived from the specific heat ratio shown on Figure 18 ; 2D or 3D computations could provide<br />
interesting data but they are outside the scope of the present RTO subgroup task.<br />
3 - 10 RTO-TR-AVT-007-V2
Change language