Numerical modeling of inert and reacting compressible turbulent jets
13th AIAA/CIRA International Space Planes and Hypersonic Systems and Technologies Conference, Capua, İtalya, 16 - 20 Mayıs 2005, cilt.1, ss.311-328, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası: 1
- Doi Numarası: 10.2514/6.2005-3237
- Basıldığı Şehir: Capua
- Basıldığı Ülke: İtalya
- Sayfa Sayıları: ss.311-328
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
The problem of application of the k-ε turbulence model to the numerical simulation of compressible round jets is analyzed by comparing experimental and numerical results. A limiting of the Pope correction is proposed to account for the vortex stretching and preserve the computational stability. The limited Pope correction is validated in case of an incompressible round jet in a slow coflow. Two variants of the Sarkar compressibility correction are validated for compressible plane mixing layers with different convective Mach numbers. The Sarkar and limited Pope corrections are then tested for several compressible round jets in still air and supersonic coflow. The simulations have demonstrated a good performance of the k-ε model with the two corrections. The effect of the turbulent Schmidt number is investigated for compressible round jets of helium and hydrogen in supersonic air coflow. Reactive and non-reactive flows are considered for a hydrogen jet in a supersonic combustion chamber. A close agreement with the experiment has been obtained for the mixing process by adjusting the turbulent Schmidt number.