Search Results - "Hung, David L. S."

Cycle-to-cycle variation analysis of early flame propagation in engine cylinder using proper orthogonal decomposition by Chen, Hao, Xu, Min, Hung, David L.S., Zhuang, Hanyang

“…•Cross-correlation of flame pattern is developed to compute the velocity fields.•Weak spiral flow pattern within the flame was only found in higher POD…”
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Ultrafast X-ray study of dense-liquid-jet flow dynamics using structure-tracking velocimetry by Fezzaa, Kamel, Wang, Yujie, Liu, Xin, Im, Kyoung-Su, Lee, Wah-Keat, Wang, Jin, Hung, David L. S, Winkelman, James R

“…High-speed liquid jets and sprays are complex multiphase flow phenomena with many important industrial applications. Great efforts have been devoted to…”
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Model-Based Estimation of Flow Characteristics Using an Ionic Polymer-Metal Composite Beam by Xuefei Chen, Guoming Zhu, Xiaojian Yang, Hung, David L. S., Xiaobo Tan

“…An ionic polymer-metal composite (IPMC) beam is capable of producing an electric signal closely correlated with its mechanical movement, due to the…”
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Modeling and Inverse Compensation of Temperature-Dependent Ionic Polymer-Metal Composite Sensor Dynamics by Ganley, T, Hung, D L S, Guoming Zhu, Xiaobo Tan

“…Ionic polymer-metal composites (IPMCs) have intrinsic sensing capabilities. Like many other sensing materials, however, IPMC sensors demonstrate strong…”
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Characteristics and correlation of nozzle internal flow and jet breakup under flash boiling conditions by Yang, Shangze, Li, Xuesong, Hung, David L.S., Xu, Min

“…•Jet breakup length decreases with increasing bubble fraction.•Spray mass flow rate is not significantly reduced with increasing fuel temperature.•Spray is…”
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Investigations on near-field atomization of flash boiling sprays for gasoline direct injection related applications by Li, Xuesong, Yang, Shangze, Li, Tianyun, Hung, David L.S., Xu, Min

“…Flash boiling sprays have been widely studied recently because of its potential in generating fuel sprays with improved atomization efficiencies. Due to the…”
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Time-sequenced flow field prediction in an optical spark-ignition direct-injection engine using bidirectional recurrent neural network (bi-RNN) with long short-term memory by Zhao, Fengnian, Ruan, Zhiming, Yue, Zongyu, Hung, David L.S., Som, Sibendu, Xu, Min

“…•Bi-RNN model is used for predicting time-sequenced flow fields in a SIDI engine.•Flow structure & magnitude validation are used as model performance…”
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A review on the experimental non-intrusive investigation of fuel injector phase changing flow by Yang, Shangze, Ma, Zhen, Li, Xuesong, Hung, David L.S., Xu, Min

“…Two-phase in-nozzle flows, such as cavitation and flash boiling, have been well studied as effective means to enhance spray breakup and atomization via phase…”
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Influence of swirl ratio on fuel distribution and cyclic variation under flash boiling conditions in a spark ignition direct injection gasoline engine by Yang, Jie, Xu, Min, Hung, David L.S., Wu, Qiang, Dong, Xue

“…•Influence of swirl on fuel distribution studied using laser induced fluorescence.•Gradient is sufficient for fuel spatial distribution variation…”
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Impact of flash boiling multiple injections timing on the combustion and thermal efficiency of a gasoline direct injection engine under lean-burn by Sun, Zhe, Xu, Qinglin, Cui, Mingli, Nour, Mohamed, Li, Xuesong, Hung, David L.S., Xu, Min

“…•Split flash boiling spray can create a good mixture by use of airflow.•Second injection with highest tumble flow has the best combustion efficiency.•A new…”
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In-nozzle flash boiling flow of multi-component fuel and its effect on near-nozzle spray by Yang, Shangze, Li, Xuesong, Hung, David L.S., Arai, Masataka, Xu, Min

“…•The addition of high volatility fuel induces more flash boiling bubbles.•The addition of high volatility fuel improves the break and atomization…”
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Study of component proportion effects on flash boiling atomization with ternary-alkane fuel mixtures by Zhou, Xiaowei, Zhai, Qiaozhi, Hung, David L.S., Li, Xuesong, Xu, Min

“…•Effects of Tf and Pa for ternary alkane-fuel spray on flash boiling phenomenon are introduced.•Fuel components with various vapor pressure have different…”
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Analysis of evaporation characteristics and heat transfer for flash-boiling sprays by Li, Tianyun, Dong, Xue, Hung, David L.S., Li, Xuesong, Xu, Min

“…•Liquid temperature and vapor concentration of sprays were studied using LIEF.•Effects of injection parameters on spray evaporation and heat transfer were…”
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In-nozzle bubble formation and its effect on fuel jet breakup under cavitating and flash boiling conditions by Yang, Shangze, Wang, Shangning, Sun, Zhe, Li, Xuesong, Hung, David L.S., Xu, Min

“…•Cavitation boiling is proposed in this study.•Cavitation boiling is enhanced by the increment of fuel temperature.•Cavitation is suppressed by the increment…”
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K-means clustering-driven detection of time-resolved vortex patterns and cyclic variations inside a direct injection engine by Zhao, Fengnian, Hung, David L.S., Wu, Shengqi

“…•K-means clustering method is applied to reveal transient vortex behavior.•Proposed method can cluster vortices into zones with flow features retained.•Vortex…”
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In-nozzle flow investigation of flash boiling fuel sprays by Wu, Shengqi, Xu, Min, Hung, David L.S., Pan, Hujie

“…•Effects of fuel temperature and ambient pressure on in-nozzle flow characteristics are revealed.•The relationship between in-nozzle flash boiling bubbles and…”
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Experimental study of flash boiling spray vaporization through quantitative vapor concentration and liquid temperature measurements by Zhang, Gaoming, Hung, David L. S., Xu, Min

“…Flash boiling sprays of liquid injection under superheated conditions provide the novel solutions of fast vaporization and better air–fuel mixture formation…”
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Flash boiling fuel initial disturbance in a transparent step-hole nozzle and its effect on external flows by Yang, Shangze, Zhai, Qiaozhi, Li, Xuesong, Hung, David L.S., Xu, Min

“…•Fuel Initial disturbance inside of the nozzle was induced by the internal bubble.•The use of the step-hole nozzle could enhance the fuel initial…”
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Proper orthogonal decomposition analysis of fuel spray structure variation in a spark-ignition direct-injection optical engine by Chen, Hao, Hung, David L. S., Xu, Min, Zhuang, Hanyang, Yang, Jie

“…For spark-ignition direct-injection (SIDI) engines in which fuel is injected directly in the cylinder, large amount of in-cylinder mixture variation on a…”
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Temporal investigations of transient fuel spray characteristics from a multi-hole injector using dimensionless analysis by Zhang, Gaoming, Hung, David L.S.

“…•Formation of high pressure spark-ignition direct-injection fuel spray is investigated from a force analysis point of view.•Spray characteristics are governed…”
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