ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Malekpour et al. [1] showed that a simple elbow with an air vent, which is installed on top of a drop shaft, admits considerable amount of air into the system (Figure a-1). The negative pressure at a high point inside the elbow is the main reason for admitting air into the system. The negative pressure is due to the hydraulic grade line which fall below the pipe`s centerline. This system is very simple and competitive with other systems such as drop shaft with a Double Vortex Inlet (DVI) [1 and 2]. Malekpour et al. [1] also performed a 3D twophase flow analysis by Fluent software for simple elbow and the results showed that the air partly separate from the water flow even in the end of drop shaft. By increasing the mixing and the time mixing, this system will be appropriate to use in sewer networks. This study explain how by using the spiral blades in the drop shaft of elbow, the mixing increase significantly. In addition, the other parameters that may be having influences on the air discharge are examined. Figure (a-1) shows the cross section of a simple elbow that is using in this research. In addition, in this model for increasing the mixing, two spiral blades are added to the middle of drop shaft. Two set of spiral blades have opposite directions, therefore the mixing will increase more.