Comprex (R) Supercharging and Emissions Reduction in Vehicular Diesel Engines

Mayer, Andreas; Pauli, Ernst; Gygax, Johannes

doi:10.4271/900881

Cited by 8 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other researchers have made similar observations, e.g. Mayer et al [2]. The wave processes as described previously correspond to a "perfectly tuned" pressure wave supercharger according to the engine demands.…”

Section: Reverse Flow Wave Rotorsupporting

confidence: 74%

“…In the existing pressure wave superchargers manufactured so far it is observed that the length of each wave rotor channel is much larger than its height and width, according to Mayer et al [2]. This justifies the approximation of the flow inside a channel formed by two consecutive blades with the flow inside a shock tube.…”

Section: Assumptionsmentioning

confidence: 96%

“…This remaining air gives the energy to scavenge the cells, namely to replace the exhaust gas with air. From figure 2(b), one can see that mainly hot gases remain in the right part of the rotor, corresponding to ports (2) and (4), while the air remains in the left part of the rotor, corresponding to ports (1) and (3). Other researchers have made similar observations, e.g.…”

Section: Reverse Flow Wave Rotormentioning

confidence: 99%

“…From figure 4(a) one can see that the upper part (ports (2), (3)) corresponds to the high pressure part of the cycle, while the lower part (ports (1), (4)) corresponds to the low pressure part. The self-cooling aspect of the through-flow configuration can be clearly seen from figure 4(b) where cold air coming from compressor through the port (1) traverses the wave rotor channels and flows out towards the combustion chamber (port (2)). This allows the blade material to be cooled by forced convection and not only by conduction.…”

Section: Through-flow Four-port Wave Rotormentioning

confidence: 99%

“…In such applications, the ports are connecting the rotor to the fresh air intake, to the exhaust pipe and to the inlet and outlet of the combustion chamber of the engine. Automobile applications of the pressure wave supercharger over a wide range of car and truck diesel engines, showed a fast response to changes in the engine load, resulting in almost instantaneous availability of maximum torque, according to Mayer et al [2].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A computational method for pressure wave machinery to internal combustion engines and gas turbines

Fatsis¹,

Vrachopoulos²,

Mavrommatis³

et al. 2006

WIT Transactions on Engineering Sciences, Vol 52

View full text Add to dashboard Cite

Pressure wave machinery constitutes promising devices in various engineering propulsion applications such as superchargers in automobile engines and topping devices in gas turbines. This article presents applications of a numerical model for the flow field prediction inside wave rotors. The numerical method used consists of an approximate Roe solver that takes into account viscous and thermal losses inside the rotor as well as leakage losses at the extremities of the rotor. The model is extensively validated and then is applied on configurations suited for automobile engine supercharging and for topping devices for gas turbines. For both cases, satisfactory results are obtained by the comparison of the numerical predictions against experimental data available in the literature. It is concluded that the present method can accurately predict the basic unsteady flow patterns inside the rotor.

show abstract

Section: Reverse Flow Wave Rotorsupporting

confidence: 74%

Section: Assumptionsmentioning

confidence: 96%

Section: Reverse Flow Wave Rotormentioning

confidence: 99%

Section: Through-flow Four-port Wave Rotormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations