Aiaa2011 presentation
- 1. NRBF sources: StD = 1.1 23 / 31
- 2. r/R NRBF sources: StD = 1.45 2 1 0 0 5 10 15 z/R 24 / 31
- 3. r/R NRBF sources: StD = 2.55 2 1 0 0 5 10 15 z/R 25 / 31
- 4. r/R Qualitative validation: n = 0, StD = 1.1 DNS 6 4 2 0 r/R 0 10 20 30 40 z/R 50 60 70 LEE 6 4 2 0 0 10 20 30 40 z/R 50 60 70 26 / 31
- 5. Conclusion 1 Algorithm to compute the NRBF sources at multiple frequencies 2 In laminar jet: linear shear noise term is major source NRBF decomposition and sources for a fully turbulent jet 3 wavepackets monopole vortex pairing 27 / 31
- 7. Part IV Extras 29 / 31
- 8. Pressure in Fourier domain (ω = 1.2) 0 0.25 0.5 2 kr 1 0 1 kz 2 Pressure P1.2 (k) 30 / 31
- 9. Pressure in Fourier domain (ω = 1.2) 0 0.25 0 0.5 0.5 1 3 2 2 kr kr 1 1 0 0 1 kz 2 Pressure P1.2 (k) 0 1 kz 2 3 Gaussian filter W(k) 30 / 31
- 10. Pressure in Fourier domain (ω = 1.2) Decomposition 0 0.25 0.5 2 kr 1 0 1 kz 2 Radiating pressure P1.2 = WP 31 / 31
- 11. Pressure in Fourier domain (ω = 1.2) Decomposition 0 0.25 0 0.5 0.25 0.5 3 2 2 kr kr 1 1 0 0 1 kz 2 Radiating pressure P1.2 = WP 0 1 kz 2 3 Non-radiating pressure P1.2 = (1 − W)P1.2 31 / 31