A prediction method, known as the Coupled Time Scale (CTS) is proposed in current work to estimate ignition delay time (IDT) of liquid spray combustion by only performing an inert simulation and a zero-dimensional (0-D) homogeneous reactor (HR) simulation. The method built upon assumption that if majority vapor regions has composition close most reactive mixture fraction, which can be obtained ...

Fundamental experiments and direct numerical simulations indicate that reaction rates during the ignition delay of direct-injection, stratified charge mixtures are determined by both chemical reaction and mixing rates. Consequently, the commonly used, purely chemistry-dependent approach for predicting ignition is no longer valid when the mixing rate limits the reaction rates. This work proposes...

conventional compression ignition (ci) engines are known for their high thermal efficiency compared to spark ignited (si) engines. gasoline because of its higher ignition delay has much lower soot emission in comparison with diesel fuel. using double injection strategy reduces the maximum heat release rate that leads to nox emission reduction. in this paper, a numerical study of a gasoline fuel...

microhole electrical discharge machining (EDM) system with daptive fuzzy logic control and precision piezoelectric stage is eveloped in this study. A high-speed EDM monitoring system is mplemented to measure the gap voltage, current, and ignition elay time, which are used to derive three input parameters—the verage gap voltage, deviation in spark ratio, and change in the eviation in spark ratio...

The ignition, puffing and sooting characteristics of Chinese RP-3 kerosene droplet burning have been studied using high-speed, OH* chemiluminescence soot thermal radiation imaging. experiments were conducted in air at standard temperature sub-atmospheric pressures ranging from 0.2 bar to 1 bar. was supported by a thermocouple tip ignited retractable coiled heating wire. results showed that the ...

In scramjet engines, ignition must take place within a residence time on the order of milliseconds. this study, secure conditions for specified n-octane pyrolysis fuel components used in autoignition or forced-ignition by plasma jet torch high-speed flow were numerically investigated. First, delay combustor and cavity flame-holder was estimated using chemical reaction analysis. Three (n-C8H18, ...

in this paper, behavior of teleoperation systems with modeling error and delay time error in smith predictor is discussed. in teleoperation systems, modeling error is inevitable. this paper discusses stability of teleoperation systems with modeling error. first, error of delay time in teleoperation systems by using of internet as communication channel is considered and the performance of smith ...