http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ISO 5167-4에 따른 벤투리 설계, 제작 및 유량측정 연구
서진혁(Jinhyeuk Seo),임우태(Wootae Lim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
Venturi meter is one of the representative flowmeters due to relatively small pressure losses. It has been widely used in fluid engineering applications such as heavy industries and energy plants. This study is aimed to design and fabricate a venturi tube based on the ISO 5167-4 and thus provides a discharge coefficient through an accurate in-situ calibration with the primary method by measuring mass flow rate with the loadcell. Flow rate measured by the venturi flowmeter can be also validated with the values of corresponding in-line reference flowmeters; an electromagnetic flowmeter and Coriolis flowmeter. Additionally, the test uncertainty of flow rate measurement can be revealed to allowable reliability based on ASME PTC 19.1.
Long-Distance Microscope Lens를 이용한 직교유동 가시화
김재윤(Jaeyun Kim),서진혁(Jinhyeuk Seo),이준식(Junsik Lee),김진섭(Jinsub Kim),이정호(Jungho Lee) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Cross flow is a current of flow that flows against or across the main current. It has been widely used in engineering applications for film cooling of gas turbine, smokestack pollution dispersion, fuel injection, aircraft control, etc. The jet in cross flow has various characteristics compared with normal flow in flow structure, general dynamics and mixing properties. Although there are a variety of flow analysis methods, flow visualization and numerical analysis are regarded as two major methods. Flow visualization was utilized to analyze the cross flow in this study. The cross flow was made by visualization test rig and oil droplets which are mixed with the cross flow are illuminated by the diode pumped solid state (DPSS) laser and captured with a high speed camera according to change of blowing ratio. Also, the flow near the jet hole was observed in detail utilizing Long-Distance Microscope Lens. This work is intended to examine a distinguished structure of the jet in cross flow through flow visualization and to get better understandings of the flow physics.