Aerodynamic properties of turbulent combustion fields

摘要: Flow fields involving turbulent flames in premixed gases under a variety of conditions are modeled by the use numerical technique based on random vortex method to solve Navier-Stokes equations and flame propagation algorithm trace motion front implement Huygens principle, both due Chorin. A successive over-relaxation hybrid is applied Euler equation for flows an arbitrarily shaped domain. The images, conformal transformation, integral-equation also used treat special cases, according their particular requirements. Salient features interpreted relating them aerodynamic properties flow field. Included among well-known cellular structure stabilized bluff bodies, as well formation characteristic tulip shape propagating ducts. In its rudimentary form, mechanism shown consist of: (1) rotary eddies at front, (2) self-advancement appropriate normal burning speed, (3) dynamic effects expansion exothermicity combustion reaction. An idealized model illustrate these fundamental mechanisms investigate basic gases. case confined behind rearward-facing step given care attention. Solutions be satisfactory agreement with experimental results, especially respect global such average velocity profiles reattachment length.