광폭면 분무를 위한 2유체 노즐의 분무 특성에 관한 연구

다국어 초록 (Multilingual Abstract)

The purpose of this paper is to develop the twin-fluid atomizer having excellent performances. To develop this atomizer, the spray characteristics of how wide areas can be painted efficiently by one time spraying were studied in this paper. Spray phenomena are affected by the many factors determining the spray field such as the injection pressure of air assist, the injection pressure and viscosity of liquid paint, the open time of needle valve, the dimension of nozzle, and so on. In this study, the results that these factors affect on spray characteristics are as followings;
The optimum spraying pressure of air assist was 1.5~2.0 ㎏f/㎠, and the appropriate injection pressure of liquid paint was 1.0 ㎏f/㎠. In these situations, the setting up pressures must be corrected because a decompression occurred when operating valves. The open of needle valve must be controlled to inject gas for 1~2 seconds after injecting liquid. This operating of the needle valve was necessary to avoid the affect of liquid column and to prevent the droplet deposit.
The spray tip penetrations was gained form the experimental equations, and the effective spray angle was 85°±5° just when the injection pressure of air was appropriate. The distribution of spray areas was 350±50㎜. because of the injection pressure of air, the its distance from spray tip, and the needle vale lift.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험장치 및 실험방법
• 3. 실험결과 및 고찰
• 4. 결론
• References