Honeywell Engines, Systems & Services has developed the Advanced Combustion Tool (ACT) CFD process to rapidly analyze the performance of a combustor configuration from a given fuel injector, CAD geometry and engine cycle information. ACT integrates and streamlines the traditional steps of generating and specifying geometry, mesh, physical models, boundary conditions, initial conditions, convergence criteria and post-processing. Notably, ACT utilizes several key features to reduce cycle time and improve fidelity in the CFD analysis process: a high-pressure spray diagnostic facility to obtain fuel droplet boundary conditions, feature-based macros to parametrically automate geometry and mesh generation, preprocessors to simplify and standardize boundary condition and physical model specification, and post-processors to provide graphical and analytical responses. This integrated process for CFD modeling and optimization is the subject of this paper. A demonstration of this process is the numerical prediction of the TFE731-60 combustor flowfield on a 30 degree sector model compared to experimentally measured results.

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Large Eddy Simulation (LES) of gas turbine combustors has gained traction as a key tool in the design process. Accurate prediction of the multiphysics of reacting flows — evaporating fuel spray, turbulent mixing, turbulent chemistry interaction, radiation, and conjugate heat transfer to name a few — is key to the accurate prediction of combustor performance. The overall solution time for a standard LES simulation on an industrial system can be burdensome because of the small time and length scales required to capture the aforementioned multiphysics to an acceptable level. Any performance improvements are therefore welcomed. In this paper, we compare the implicit non-iterative PISO solution procedure with the implicit iterative SIMPLE method for the Large Eddy Simulation of a Honeywell combustor using the commercial software, Simcenter STAR-CCM+ v13.04. Time averaged simulation results are validated against rig data. Results show that the PISO solution method provides results which are similar to those found using the SIMPLE method, and accurate when compared to rig data, but at up to a 3.4X speed-up for this liquid fueled gas turbine combustor.

ALTHOUGH the primary object of this article is to describe processes and plant used in the manufacture of cold drawn seamless steel tubing, it cannot be considered complete without some reference to previous work on the steel, by which it is converted from the solid rolled billet to the hollow bloom, which may be considered as the “raw material” for cold drawing.