SINGLE-PHASE AND TWO-PHASE PRESSURE DROPS ACROSS SUDDEN CONTRACTION IN HORIZONTAL RECTANGULAR MINICHANNEL
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND CONSTRUCTION ENGINEERING
Author(s): AGUS SANTOSO , AKIMARO KAWAHARA , DAIKI GOTO , MICHIO SADATOMI , TOMOAKI TAKEHIRA
Abstract: This paper presents experimental investigations on the effects of liquid properties on pressure drop for both single-phase and two-phase flows through sudden contraction in horizontal rectangular minichannel. In order to know the effects, water and viscoelastic liquid, namely 0.1 wt% polyacrylamide (PAM) aqueous solution are selected as the working liquid, while air as the working gas. Liquid single-phase and air-liquid twophase flow experiments were conducted at room temperature using a horizontal rectangular mini-channel with a sudden contraction. The cross-sectional dimensions of the channel with the height (H), the width (W) and the hydraulic diameter (DH) for the narrow channel are 2.79 mm, 3.09 mm and 2.94 mm, while those for the wide channel are 2.95 mm, 5.98 mm and 3.95 mm. The local pressure upstream and downstream from the contraction were measured with calibrated pressure transducer to determine the pressure drop due to the contraction. As an analysis, the resulting data on
- Publication Date: 19-Apr-2015
- DOI: 10.15224/978-1-63248-059-0-65
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COMPARISON OF MIST GENERATORS BETWEEN TWIN-FLUID WATER SUCTION TYPE AND SINGLE-FLUID SWIRL TYPE
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN MECHANICAL, AERONAUTICAL AND PRODUCTION TECHNIQUES
Author(s): AKIMARO KAWAHARA , DAIKI GOTO , MICHIO SADATOMI
Abstract: Sadatomi and Kawahara invented a multi-fluids mixer which is categorized as a twin-fluid type but have a merit of water suction type. The mixer is usable to generate microbubbles, etc. besides mists, fine droplets. In the mists generation, pressurized air alone is supplied because water can be sucked automatically by a negative pressure arisen downstream from the orifice in the mixer. The objective of the present study is to compare the performance between the above twin-fluid type atomizer and a common single-fluid swirl type atomizer studied in the present experiments. The comparison results showed that the twin-fluid type was superior to the singe-swirl type in the performance of CO2 adsorption by the mists. The CO2 adsorption rate by the twin-fluid type was about twice. Such results on the experiments and the comparisons are described in this paper
- Publication Date: 12-Apr-2015
- DOI: 10.15224/978-1-63248-059-0-66
- Views: 0
- Downloads: 0