A New Method of Fractal Analysis Using Wavelet Transform and its Application in Tumbling Flow Analysis(<Special Issue>Recent Combustion Technology in Internal Combustion Engines)
スポンサーリンク
概要
- 論文の詳細を見る
In this study, we proposed a new method to calculate the fractal dimension in order to evaluate the change of the eddy structure of tumbling flow. The procedure of our method is 1) Carrying out wavelet transform of the turbulence and obtaining the information of the turbulence about both time and frequency. 2) Calculating the fractal dimension at each time from the wavelet transform of the turbulence. 3) Evaluating change of the eddy structure in the turbulence by using the fractal dimension obtained. As a result, the fractal dimension first decreases a little at the time of the tumbling flow broken down and then the fractal dimension increases near TDC. that is, the eddies that are generated by the tumbling flow which has broken down have larger scale and transmit the energy to the small eddies in the compression stroke.
- 一般社団法人日本機械学会の論文
- 2003-02-15
著者
-
Tomita E
Okayama University
-
Tomita Eiji
Okayama University
-
Zhang Zhong
Industrial Technology Center Of Okayama Prefecture
-
Zhang Z
Doshisha Univ. Kyoto Jpn
-
KAWABATA Hiroaki
Okayama Prefectural University
-
Zhang Zhong
Industrial Technology Center Of Okayama
関連論文
- Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer
- Direct Measurement of Burning Velocity of Flame Propagating in Fuel-Air Homogeneous Mixtures in a Closed Vessel
- Effects of Swirl and Air-Fuel Ratio on Premixed Combustion in a Closed Vessel
- Turbulent Premixed Flames in a Closed Vessel Studied Through Analysis of Flame Photographs
- The Effect of Swirl on the Combustion of a Homogeneous Mixture n a Closed Vessel
- Ion Current in a Homogeneous Charge Compression Ignition Engine
- (2-08) Effects of Swirl Turbulent Flow Field and Inhomogeneous Concentration Field on Combustion of Fuel-Air Mixture in a Constant Volume Vessel((SI-3)S. I. Engine Combustion 3-Flow and Combustion)
- B307 Flame Propagation of Inhomogeneous Feel-Air Mixture with Swirl in a Constant-Volume Vessel(Turbulent flame-2)
- E308 A Study on Hydrogen Combustion Ignited with Light Oil in a Dual Fuel Engine(Engine performance)
- The Effect of Swirl on Spark-Ignition Engine Combustion
- Measurement of fuel concentration distribution of transient hydrogen jet and its flame using planar laser induced fluorescence method
- A New Method of Fractal Analysis Using Wavelet Transform and its Application in Tumbling Flow Analysis(Recent Combustion Technology in Internal Combustion Engines)
- Wavelet Transform Analysis of Unsteady Turbulence and Turbulent Burning Velocity in a Constant-Volume Vessel
- (2-07) Analysis of Fractal Characteristics of tumbling flow in a Spark Ignition Engine Using Wavelet Transform((SI-3)S. I. Engine Combustion 3-Flow and Combustion)
- Data Analysis in Unsteady Turbulent Flow Measurement : Preliminary Study of Data Analysis of Turbulent Flow in Engine Cylinder
- TED-AJ03-397 HOMOGENEOUS CHARGE COMPRESSION IGNITION COMBUSTION WITH DIMETHYL ETHER : ANALYSIS OF TWO-STAGE HEAT RELEASE
- 525 RI-SPLINE WAVELET AND ITS APPLICATION ON DE-NOISING
- Measurement of hydrocarbon fuel concentration by means of infrared absorption technique with 3.39μm He-Ne laser
- Turbulent Premixed Flames in Closed Combustion Chambers
- Ambient Gas Entrainment into a Transient Gas Jet : Visualization of Surrounding Air Motion and Estimation of Entrainment Amount by Path Line Method
- Knocking detection using wavelet instantaneous correlation method
- SC3-2: Effect of Nozzle Geometry on Atomization of Transient Spray from Port Fuel Injector(SC: Spray and Spray Combustion,General Session Papers)
- SC4-1: Spray Behavior near the Nozzle of a DISI Multi-Hole Injector Using Phase Doppler Anemometer(SC: Spray and Spray Combustion,General Session Papers)