活塞碗几何和-柴油混合比率对双燃料发动机燃烧的影响
Ranjan Kumar1, Sudipta Nath1, Atul2
1Department of Mechanical Engineering, Swami Vivekananda University, Kolkata 700121, India.
ACS omega
|February 9, 2026
概括
在柴油发动机中优化活塞碗设计显著影响性能和排放. 重回进入的活塞碗提高了发动机功率,并减少了燃料消耗和有害的氧化排放.
科学领域:
- 内部燃烧发动机 内部燃烧发动机
- 其他替代燃料 替代燃料
- 燃烧科学 燃烧科学
背景情况:
- 活塞碗的形状极大地影响燃料空气混合,发动机性能和排放.
- 柴油双燃料发动机提供了提高燃油经济性和减少环境影响的潜力.
- 直接注入 (DI) 策略是优化这些发动机内燃烧的关键.
研究的目的:
- 调查不同活塞碗设计对柴油DI发动机燃烧和排放的影响.
- 识别能提高发动机性能,降低燃料成本,改善排放特性的活塞碗几何形状.
- 为四冲程柴油发动机中最佳的活塞碗选择提供建议.
主要方法:
- 我们使用数值模拟来分析三个不同的活塞碗设计.
- 评估了发动机性能指标,包括气功率和指示特定燃料油消耗 (ISFOC).
- 评估了排放量,特别是氧化 (NOx),烟尘和二氧化碳 (CO2).
主要成果:
- 与U型碗相比,重新进入的活塞碗增加了2.65%的气功率,并减少了1.63%的ISFOC.
- 由于高峰温度较低,w型和回入式碗分别减少了25.59%和46.09%的氧化排放量.
- 活塞碗的几何形状也影响了烟尘和二氧化碳排放.
结论:
- 返入活塞碗在柴油发动机中表现出优越的性能,提供更高的功率和效率.
- 通过优化的活塞碗设计,如重新进入类型,可以实现大幅减少氧化排放.
- 建议在四冲程柴油发动机中采用回入活塞碗,以提高性能和减少排放.
更多相关视频
08:16Combustion Characterization and Model Fuel Development for Micro-tubular Flame-assisted Fuel Cells
Published on: October 2, 2016
10.0K
07:24Combustion Chemistry of Fuels: Quantitative Speciation Data Obtained from an Atmospheric High-temperature Flow Reactor with Coupled Molecular-beam Mass Spectrometer
Published on: February 19, 2018
10.5K
相关概念视频
Internal Combustion Engine
2.8K
The internal combustion engine is a heat engine that uses the byproducts of combustion as the working fluid instead of using a heat transfer medium to transfer heat. The combustion is done in a way that produces high-pressure combustion products that can be expanded through a turbine or piston to create work. Internal combustion engines can again be categorized into three kinds: (1) spark ignition gasoline engines, most commonly used in automobiles, (2) compression ignition diesel engines that...
2.8K
Coordination Number and Geometry
19.1K
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
19.1K
Batteries and Fuel Cells
31.0K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
31.0K
Predicting Molecular Geometry
46.1K
VSEPR Theory for Determination of Electron Pair Geometries
46.1K
Hydrogen Bonds
134.2K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
134.2K
Hydrogen Bonds
14.9K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
14.9K
