Numerical Modelling of Explosion Protection
- 33 Downloads
With their highly volatile and flammable fuels, gas engines require extensive measures to prevent and counter the effects of unintended explosions outside the combustion chamber. Hoerbiger Ventilwerke has developed a method capable of rapidly determining the optimum number and position of explosion relief valves in intake and exhaust systems.
Explosion protection on gas engines
Large spark-ignited gas and dual-fuel engines need to be protected against explosions in their inlet and exhaust systems. Compared to crankcase explosions, these events are harder to model, and there are no accepted standards for sizing and locating relief valves. Design methods based on 3-D Computational Fluid Dynamics (CFD) models are slow, expensive, and of unproven accuracy. A new approach based on 1-D modelling, on the other hand, is low cost, easy to use and matches experimental results well. By helping engineers to optimise relief systems, the new software makes engine system design safer, quicker, and...
KeywordsComputational Fluid Dynamics Failure Mode Flame Front Flame Propagation Exhaust System
- De Wit, J.: Safety matters: experience with the operation of gas engine CHP units. In: Cogeneration and On-site Power Production, Vol. 7, Issue 5, 2006Google Scholar
- Göttgens, J., Mauss, F., Peters, N.: Analytic Approximations of Burning Velocities and Flame thickness of Lean Hydrogen, Methane, Ethylene, Ethane, Acetylene, and Propane Flames. Twenty-Fourth Symposium (International) on Combustion/The Combustion Institute, 1992, pp. 129–135Google Scholar
- LeVeque, R. J.: Shock tracking with the large time step method. In proceedings, 7th International Conference on Computational Methods in Applied Science and Engineering., lowinskid R.; Lions, J.-L., eds., Versailles, 1985Google Scholar
- Shapiro, A. H.: Dynamics and Thermodynamics of Compressible Fluid Flow, Vols. I&II, Ronald Press, New York, 1953Google Scholar
- Damköhler, G.: Der Einfluss der Turbulenz auf die Flammengeschwindigkeit in Gasgemischen. In: Zeitschrift für Elektrochemie und angewandte physikalische Chemie, No. 46, 1940, pp. 601–626Google Scholar