Numerical Assessment of Combustion Behavior and Emission Formations in an Ultrasonic-Assisted Ignition Engine.

By effective utilization of the dynamic mesh and coordinate transformation techniques, an ultrasonic horn is physically integrated in the chamber of an internal combustion engine. The consequences of multiple ultrasonic-fed strategies on the flow field, combustion process, and emission formation under the same working conditions are studied by numerical simulation. Based precisely on the bench test data, GT-Power and CONVERGE set up the original engine one-dimension (1d) and three-dimension (3d) simulation models.

Effect of ultrasonic-fed time on combustion and emissions performance in a single-cylinder engine.

In this study, a numerical simulation method for multi-field coupling is proposed in which the ultrasonic is physically fed in the combustion chamber of a gasoline engine. The fine-tuning regulation of activity and reaction paths of gas-liquid two-phase (GLP) fuel is studied by using ultrasonic under in-cylinder complex conditions. The three-dimensional (3D) computational fluid dynamics (CFD) model of the original engine is calibrated, based on the bench test data.

Potential improvement in combustion and pollutant emissions of a hydrogen-enriched rotary engine by using novel recess configuration.

The rotary engine constitutes promising propulsion for unmanned aerial vehicles, and creating turbulence within the rotor chamber is an effective means to strengthen the combustion of this engine concept since it is characterized by a unidirectional flow from the trailing side to the leading side of the rotor chamber. Based on CFD modeling, this work proposed a novel turbulence-induced blade (TIB) configuration and carried out a feasibility assessment focused on this innovation for improving engine performance under different operation/design parameter conditions (spark timing, hydrogen enrichment, and compression ratio). The results of this work confirmed the benefit of this proposed configuration as a useful tool to enhance combustion characteristics and control emissions formation.

Maimendong Decoction Improves Pulmonary Function in Rats With Idiopathic Pulmonary Fibrosis by Inhibiting Endoplasmic Reticulum Stress in AECIIs.

This study was designed to investigate the mechanism by which MMDD improves lung function, and observe the effect of MMDD on endoplasmic reticulum stress(ERS) in alveolar type II epithelial cells (AECIIs) of pulmonary fibrosis rats. pulmonary fibrosis animal model was established by intratracheal injection of BLM at a dose of 6mg/kg body weight. Overall, Thirty male SPF Sprague-Dawley rats were randomly divided into control group, BLM group and BLM+MMDD group.