Comparatively investigating the leading and trailing spark plug on the hydrogen rotary engine

Fuel ◽  
2022 ◽  
Vol 308 ◽  
pp. 122005
Author(s):  
Jinxin Yang ◽  
Hao Meng ◽  
Changwei Ji ◽  
Shuofeng Wang
Keyword(s):  
Rotary Engine ◽  
Spark Plug

Predicting Gas Leakage in the Rotary Engine—Part I: Apex and Corner Seals

2015 ◽  
Vol 138 (6) ◽  
Author(s):  
Mathieu Picard ◽  
Tian Tian ◽  
Takayuki Nishino
Keyword(s):  
Fuel Consumption ◽  
Power Density ◽  
High Speed ◽  
Hydrocarbon Emissions ◽  
Gas Flows ◽  
Gas Leakage ◽  
Rotary Engine ◽  
Spark Plug ◽  
Engine Part ◽  
Rotary Engines

The Wankel rotary engine offers a greater power density than piston engines, but higher fuel consumption and higher hydrocarbon emissions, in large part due to poor gas sealing. This paper presents a modeling approach to evaluate the gas leakage of apex and corner seals in rotary engines. The apex seal is modeled as a deformable beam and its dynamics is coupled with the gas flows around the seal. It is shown that the main leakage mechanisms are: (1) corner seal clearance leakage, (2) leakage around the apex seal through the spark plug cavities, and (3) flank leakage at high speed. The side piece corner orifice and the trailing spark plug cavity also contribute to leakage, but to a lesser extent. Leakage through the seal–housing interface is negligible as the apex seal can conform to the distorted shape of the rotor housing.

Influences of Ignition Timing, Spark Plug and Intake Port Locations on the Combustion Performance of a Simulated Rotary Engine

2016 ◽  
Vol 32 (5) ◽  
pp. 579-591 ◽  
Author(s):  
P.-W. Hwang ◽  
X.-C. Chen ◽  
H.-C. Cheng
Keyword(s):  
Flow Field ◽  
Combustion Chamber ◽  
Combustion Efficiency ◽  
Intake Port ◽  
Computational Domain ◽  
Ignition Timing ◽  
Combustion Chambers ◽  
Combustion Performance ◽  
Rotary Engine ◽  
Spark Plug

AbstractThe purpose of this paper is to study the flow field of the combustion chamber in a simulated rotary engine by using a computational approach. A dynamic mesh technique is employed to overcome the moving and shape varying computational domain inside the combustion chambers as the rotor is spinning. The key parameters include spark plug timing, leading side spark plug location and intake port location, which are used to investigate their influences on flow field and combustion performance of a rotary engine. It was discovered, with a dual spark plug configuration, that better flame propagation could be obtained through the change of ignition timing. In addition, to change the leading side spark plug location, it was also found that combustion efficiency is improved by shortening the distance from the top dead center (TDC) center line, which is consistent with available experimental results. This research also discovered that the intake port should be properly located in order to prevent pressure loss in the combustion chamber during the compression stroke.

Cycle-resolved measurements of the fuel concentration near a spark plug in a rotary engine using an in situ laser absorption method

2007 ◽  
Vol 31 (2) ◽  
pp. 3033-3040 ◽  
Author(s):  
Nobuyuki Kawahara ◽  
Eiji Tomita ◽  
Kenta Hayashi ◽  
Michihiko Tabata ◽  
Kouhei Iwai ◽  
...  
Keyword(s):  
Absorption Method ◽  
Fuel Concentration ◽  
Rotary Engine ◽  
Laser Absorption ◽  
Spark Plug

Comparative study on different spark plug positions of a rotary engine with gasoline port and direct injection

Fuel ◽  
2021 ◽  
pp. 122376
Author(s):  
Ke Chang ◽  
Changwei Ji ◽  
Shuofeng Wang ◽  
Jinxin Yang ◽  
Hao Meng ◽  
...  
Keyword(s):  
Comparative Study ◽  
Direct Injection ◽  
Rotary Engine ◽  
Spark Plug

Study of the resistor material of an automotive spark plug by use of the charge-up effect along with elemental mapping in an electron microprobe

1991 ◽  
Vol 49 ◽  
pp. 742-743
Author(s):  
D. R. Liu ◽  
S. S. Shinozaki ◽  
J. S. Park ◽  
B. N. Juterbock
Keyword(s):  
Electron Microprobe ◽  
Present Report ◽  
Coated Sample ◽  
Valuable Insight ◽  
Elemental Mapping ◽  
Spark Plug ◽  
Carbon Coated ◽  
Electron Image ◽  
Electron Imaging ◽  
Insight Into

The electric and thermal properties of the resistor material in an automotive spark plug should be stable during its service lifetime. Containing many elements and many phases, this material has a very complex microstructure. Elemental mapping with an electron microprobe can reveal the distribution of all relevant elements throughout the sample. In this work, it is demonstrated that the charge-up effect, which would distort an electron image and, therefore, is normally to be avoided in an electron imaging work, could be used to advantage to reveal conductive and resistive zones in a sample. Its combination with elemental mapping can provide valuable insight into the underlying conductivity mechanism of the resistor.This work was performed in a CAMECA SX-50 microprobe. The spark plug used in the present report was a commercial product taken from the shelf. It was sectioned to expose the cross section of the resistor. The resistor was known not to contain the precious metal Au as checked on the carbon coated sample. The sample was then stripped of carbon coating and re-coated with Au.

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