Integrated Exhaust System Modeling

Due to the increasing pressure to develop small size and low-cost aftertreatment systems meeting the legislative demands, it is desirable to integrate multiple functionalities and exploit any possible synergies between devices. Typical 

---

G. Montenegro, A. Onorati, F. Piscaglia, and G. D Errico. Integrated ID-MultiD Fluid Dynamic Models for the Simulation of I.C.E. Intake and Exhaust Systems. SAE Technical Paper, 2007-01-0495, 2007. 

The extended SCR model has been integrated with other catalyst and diesel particulate filter (DPF) models in the Daimler exhaust gas after-treatment systems simulation environment ExACT. The model was also extended to other SCR catalytic materials [79]. 

In modeling a gas turbine in the context of steam and power system, the purpose is to know the fuel consumption (gfuei) for a given net power output (Wnet) and fuel efficiency. It is also important to know the exhaust mass flow (mex) and temperature (Tex), which determine the integration opportunity with steam turbine cycle. Gas turbine performance curves are provided by manufatcturer. As an example for ilustration, the key parameters are described by the following equations (Manninen and Zhu, 1999) ... 

In the final stage of any flowing chemical laser, the processing of the exhaust effluent must be considered. This is usually accomplished by a smooth transition of the cavity shroud into a diffuser designed to raise the pressure and accommodate the low entrance Reynolds numbers. Diffuser efficiency can be considered an integral part of the overall design of the laser system. A common normal-shock diffuser model is usually adequate to optimize the performance of this section. Pumping of this effluent is subsequently accomplished after recovery of the available pressure within the system. 

---