Combustion is the main type of noise radiated from diesel engines. Several methods have been devised to reduce the noise levels. Fourier tranformation methods along with block attenuation curves have been used to study the correlation between cylinder pressure and noise radiated from engines. In this work wavelet method has been used to study noisee mitted from a dual injection diesel engine. T...

We examine a simple, fuel-air, model of combustion in spark ignition (si) engine with indirect injection. In our two fluid model, variations of fuel mass burned in cycle sequences appear due to stochastic fluctuations of a fuel feed amount. We have shown that a small amplitude of these fluctuations affects considerably the stability of a combustion process strongly depending on the quality of a...

We examine a simple, fuel-air, model of combustion in spark ignition (si) engine with indirect injection. In our two fluid model, variations of fuel mass burned in cycle sequences appear due to stochastic fluctuations of a fuel feed amount. We have shown that a small amplitude of these fluctuations affects considerably the stability of a combustion process strongly depending on the quality of a...

In this work, the techno-economic and exergy analyses of two gasification technologies with integration into heat power combined cycles are presented: i). Circulating fluidized bed (CFB) ii). Dual (DFB) systems. As feedstock, lignocellulosic biomass (sugarcane bagasse, SCB) was considered . The process fluidized-bed systems (circulating dual bed) syngas conversion were performed using Aspen Plu...

A combustion flame method is developed for the convenient and scalable fabrication of single- and dual-doped carbon quantum dots (CQDs) (N-CQDs, B-CQDs, P-CQDs, and S-CQDs and dual-doped B,N-CQDs, P,N-CQDs, and S,N-CQDs), and the doping contents can be easily adjusted by simply changing the concentrations of precursors in ethanol. These single/dual-doped CQDs, especially B,N-CQDs, show high cat...

Performance examinations of a dual-Diesel cycle engine in point performance characteristics such as exergy efficiency, power and density have been conducted. The effect design parameters the intake temperature, pressure, piston friction coefficient, average velocity, revolution, stroke length, residual gas fraction, pressure ratio, temperature compression ratio bore diameter to equivalence on a...

Lean operation of spark ignition (SI) automotive engines offers attractive performance incentives. Lowered combustion temperatures inhibit NO, pollutant formation while reduced manifold throttling minimizes pumping losses, leading to higher efficiency. These benefits are offset by the reduced combustion speed of lean mixtures, which can lead to high cycle-to-cycle variation and unacceptable eng...

E. L. Resler, Jr. Sibley School ol Mechanica l and Aerospace Engineering, Cornell University, Ithaca, NY 14853 The wa~•e roror is a promising means of pressure-gain for gas turbine engines. This paper examines novel wave rotor topping cycles that incorporate low-NO,, combustion straregies. This approach combines two-s rage ''rich-quench-lean'· ( RQL) combustion with inrermediate expansion in th...

Porous media has interesting features in compared with free flame combustion due to the extended of the lean flammability limits and lower emissions. Advanced new generation of internal combustion (IC) engines are expected to have far better emissions levels both gaseous and particulate matter, at the same time having far lower fuel consumption on a wide range of operating condition. These c...

In this work, we present the experimental results obtained from hydrogen fuelled spark-ignited dual piston free-piston engine generator (FPEG) prototype operated in two-stroke and four-stroke mode. The FPEG testing was successfully conducted at 3.7 compression ratio, speed between 5 Hz 11 with different equivalence ratios. technical details, set-up operational control are explained detail. Perf...