TY - JOUR
T1 - High Efficient Numerical Simulation of Infrared Radiation from a Hot Exhaust Nozzle
AU - Haiyang Hu, Peng Bai & Qiang Wang
JO - Communications in Computational Physics
VL - 4
SP - 1182
EP - 1204
PY - 2012
DA - 2012/04
SN - 11
DO - http://doi.org/10.4208/cicp.230410.090911s
UR - https://global-sci.org/intro/article_detail/cicp/7406.html
KW - 
AB - <p style="text-align: justify;">A coupled model, capable of simulating transonic flow, solid heat conduction, species transport, and gas radiation, is developed that provides better computational treatment of infrared radiation from hot exhaust nozzles. The modeling of gas
radiation is based on a statistical narrow-band correlated-k analysis, whose parameters are deduced from the HITEMP line-by-line database. To improve computational
efficiency, several methods are employed. A mixed analytical-numerical algorithm is
described for the stiffness of the two-equation turbulence model and an alternating
direction implicit pretreatment for the ill-conditioned matrix appearing in the coupled
problem of flow and solid heat conduction. Moreover, an improved multigrid method
and a symmetry plane treatment of the radiation transfer-energy equations are also introduced. Four numerical simulations are given to confirm the efficiency and accuracy
of the numerical method. Finally, an account of the aerothermodynamics and infrared
characteristics for two types of nozzles are presented. The infrared radiation intensity
of the Chevron ejecting nozzle is clearly smaller than that of the common axisymmetric
ejecting nozzle. All computations can be performed on a personal computer.</p>