Mar 10, 2016 - When designing complex systems, like a gas turbine, engineers need to. “Flownex is a 1D simulation software for internal flow and heat. Use the program for teaching gas turbine thermodynamics. Extending the single point simulation to off-design. GasTurb offers help for engineers who must.
Syfluid is a funny toy as well as a real simulation. It simulates a fluid or a gas in a very colorful, graphic and sometimes psychodelic way. Drag while your right mouse button is pressed to 'draw' the fluid/density field. Drag while your left mouse button is pressed to make the whole thing move, i.e. To 'draw' the 'forces' that you're adding to the fluid/density field. Press 'r' to clear the screen and 'm' to open the menu.
'8' to switch color presets. SPACE to pause.
Figure 1.Critical attributes for gas turbine combustors. Customers are demanding improved performance at lower cost from their aero-engines and land-based gas turbines. As a result, engineers designing turbine combustors must meet the high standards of various critical-to-quality (CTQ) performance factors (Figure 1). There are several elements involving fuel delivery systems and combustors that affect these CTQ factors:.
Spray. Pressure drop. Flow-split ratios. Fuel preparation. Heat transfer.
Each element has multiple variables, so engineers that optimize these systems rely on simulation to deliver high-accuracy results quickly. How ANSYS’ Simulation Solutions Help Engineers Design their Combustors Understanding combustion requires a detailed knowledge of the physical, chemical properties and reactions of fuels (kinetics, reaction mechanisms, thermodynamic properties). ANSYS’ Model Fuel Library (MFL) includes validated models for over 60 master fuel components that can simulate the combustion of most common fuels and additives. ANSYS Chemkin-Pro uses these fuel models to simulate reaction kinetics, emissions and combustion stability. The Chemkin-Pro Reaction Workbench reduces the reaction mechanism size to model combustion using less computational power. The performance of these reduced mechanisms can be compared with their parent mechanisms to assess accuracy (Figure 2).
Performance of a reduced mechanism developed using ANSYS Chemkin-Pro Reaction Workbench (blue) vs the parent mechanism (orange). Flow properties are also important in combustion. ANSYS Fluent performs computational fluid dynamics (CFD) simulations to model the following:. Sprays. Combustion/combustion dynamics. Pressure drop. Flow-split calculations.
For an example involving sprays, Figure 3 shows the primary breakup of a jet in a cross-flow configuration, which is often used to atomize fuel in gas turbine combustors. Power spectrum density variation for a LDI combustor. These simulated results correlate well with experimental data (Gejji et al. A Parametric Study of Combustion Dynamics in a Single-Element Lean Direct Injection Gas Turbine Combustor: Part II: Experimental Investigation. 52 nd Aerospace Sciences Meeting, AIAA SciTech Forum, 2014, Jan). Another area of concern for engineers is exposure of the combustor’s components to variable high temperatures — a leading cause of. Predicting the failure location and the number of cycles to failure can be done by simulating the system’s response to thermal and mechanical loads using ANSYS solutions.
ANSYS’ nonlinear material models help capture material behaviors seen in heat resistant alloys like nickel-based alloys. To learn more about ANSYS’ combustion solutions, register for the webinar Aug. 21, 2018, at 11 a.m.