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Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles

Publish Year: 1393
Type: Journal paper
Language: English
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JR_JHMTR-1-2_005

Index date: 14 September 2024

Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles abstract

Compressible gas flow inside a convergent-divergent nozzle and its exhaust plume atdifferent nozzle pressure ratios (NPR) have been numerically studied with severalturbulence models. The numerical results reveal that, the SST k–ω model give the bestresults compared with other models in time and accuracy. The effect of changes in value ofdivergence half-angle (ε ) on the nozzle performance, thrust coefficient ( Cf ) anddischarge coefficient ( C d) has been investigated numerically. The predicted results showthat for a given divergence angle, the thrust coefficient (Cf ) increases by increasing nozzlepressure ratio. Also, for a given nozzle pressure ratio, the thrust coefficient increases as thenozzle divergence angle decreases. When the CD nozzle is chocking, the value of dischargecoefficient is independent of nozzle pressure ratio and also for a given nozzle pressure ratio,the discharge coefficient increases as the divergence nozzle angle (ε) increases.

Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles Keywords:

Numerical simulation of turbulent compressible flows in a C-D nozzle with different divergence angles authors

Mohammad Hadi Hamedi Estakhrsar

Malek-Ashtar University of Technology, Tehran, Iran.

Mehdi Jahromi

Malek-Ashtar University of Technology, Tehran, Iran

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