1.

論文
論文
1. LDA Flow Rate Measurements Applied for Analysis of Transient Injection Characteristics
ISMAILOV, Murad ; DURST, Franz ; OBOKATA, Tomio
出版情報: JSME international journal. Ser. B, Fluids and thermal engineering.  42  pp.22-29,  1999-02-15.  社団法人日本機械学会
概要: application/pdf<br />Journal Article<br />In the present study an LDA-based technique was applied to analyze details of … a transient pipe-flow induced upstream by a fuel ingector. Due to highly accurate measurements of the instantaneous time series of velocity, fuel flow rate and pressure gradient were achieved. The pipe flow has been driven under an injection pressure of 0.6MPa at high injection frequencies of 25 and 50 Hz. The influence of the outflow orifice diameter, varid in range from 100 to 500 μm, on the transient pipe flow dynamics has also been described. The results show that transient behavior of rapid oscillating pipe flow is remarkably and systematically dependent on injection frequency and duration as well as on the orifice diameter. 続きを見る
2.

論文
論文
2. Visualization and Measurements of Sub-Millisecond Transient Spray Dynamics Applicable to Direct Injection Gasoline Engine : Part3:Measurements of Instantaneous and Integrated Flow Rates in High Pressure Injection System Using LDA-Based Meter
ISMAILOV, Murad ; ISHIMA, Tsuneaki ; OBOKATA, Tomio ; TSUKAGOSHI, Masayoshi ; KOBAYASHI, Kazumitsu
出版情報: JSME international journal. Ser. B, Fluids and thermal engineering.  42  pp.39-47,  1999-02-15.  社団法人日本機械学会
概要: application/pdf<br />Journal Article<br />Time-dependent centerline velocity is measured using LDA-flow meter. Swirl inj … ector at frequencies of 22 and 46 Hz generates oscillated flow under high-pressure from 4 up to 7 MPa. The encoded time-series of velocity is used to reconstruct the time-variable series of instantaneous flow rate and pressure gradient. Transient injection dynamics are analyzed to obtain basec characteristics of an injection system that will be able to be used for real time monitoring or active controlling of high-pressure gasoline injectors. The results obtained through analyzing the integrated mass rates within a cycle, indicate that a certain injection system is characterized by the flow rate constant γ which independent on injection duration and can be obtained from only accurate measurement of centerline velocity in the fuel transport pipeline. The present technique allows us to simplify the injection model and can be effectively adopted for practical employment on active and passive control with respect to gasoline direct injection engines. 続きを見る