Coupled Analysis of Thermo-Fluid-Flexible Multi-body Dynamics of a Two-Dimensional Engine Nozzle

  • Eun, WonJong (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, JaeWon (Korea Advanced Institute of Science and Technology) ;
  • Kwon, Oh-Joon (Korea Advanced Institute of Science and Technology) ;
  • Chung, Chanhoon (Korea Aerospace Industries) ;
  • Shin, Sang-Joon (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Bauchau, Olivier A. (University of Maryland)
  • Received : 2016.03.26
  • Accepted : 2017.03.15
  • Published : 2017.03.30


Various components of an engine nozzle are modeled as flexible multi-body components that are operated under high temperature and pressure. In this paper, in order to predict complex behavior of an engine nozzle, thermo-fluid-flexible multi-body dynamics coupled analysis framework was developed. Temperature and pressure on the nozzle wall were obtained by the steady-state flow analysis for a two-dimensional nozzle. The pressure and temperature-dependent material properties were delivered to the flexible multi-body dynamics analysis. Then the deflection and strain distribution for a nozzle configuration was obtained. Heat conduction and thermal analyses were done using MSC.NASTRAN. The present framework was validated for a simple nozzle configuration by using a one-way coupled analysis. A two-way coupled analysis was also performed for the simple nozzle with an arbitrary joint clearance, and an asymmetric flow was observed. Finally, the total strain result for a realistic nozzle configuration was obtained using the one-way and two-way coupled analyses.


Supported by : Agency for Defense Development, National Research Foundation of Korea(NRF)


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