Numerical simulation on the dynamical stall process of airfoils in transonic flow

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:481996

Guo, G L; Yang, Y N; Ye, Z Y ^[1]

---

1. Northwestern Polytechnical Univ., Xian (China)

In this paper, a method is presented to simulate the dynamic stall process of airfoils in transonic flow. The flowfield around the oscillating airfoil is analyzed by solving the two-dimensional time averaged compressible Navier-Stokes equations with the Baldwin-Lomax turbulence model. An implicit Lower-Upper-factorized algorithm is constructed in a body-fitted coordinate system. In the algorithm, an improved NND (Non-oscillatory, Non-free--parameter, Dissipative) scheme which is a kind of the TVD (Total Variation Diminishing) schemes is adopted. The computation grid is generated by an algebraic method. To save computation time, the grid is rigidly attached to the airfoil. The dynamic stall process is well simulated on NACA 0012 airfoil oscillating in pitch at a high incidence angle in a transonic flow. The pressure distributions and pressure contours at different moment are given to show the movement of shock wave and the change of pressure distributions.

• OSTI ID: 481996
• Report Number(s): CONF-960503--
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
42 ENGINEERING
99 GENERAL AND MISCELLANEOUS
AIRFOILS
COMPUTERIZED SIMULATION
MESH GENERATION
NAVIER-STOKES EQUATIONS
NUMERICAL SOLUTION
PRESSURE DEPENDENCE
TRANSONIC FLOW
TURBULENT FLOW