• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2009년도 춘계학술대회 논문집
• /
• pp.1680-1686
• /
• 2009

삼각 분리 막대형 차압 유량계 압력 탭의 가공 조건에 따른 유량 특성을 연구하였다. 삼각 분리 막대탭 차압 유량계에 가공한 압력 탭의 크기는 1.0 mm 또는 1.5 mm로 하였다. 압력 탭의 개수는 5개 또는 17개로 가공하였다. 삼각 분리 막대탭 차압 유량계와 층류유량계를 직결한 후 유량 특성을 검정하였다. 삼각 분리 막대탭 차압 유량계의 질량 유량을 무차원 파라미터 H를 사용하여 나타내었다. H는 TSB 유량계에서의 배압, 기체 온도, 유량계 상류압과 하류압 간의 차압을 포함하는 무차원 파라미터이다. TSB 유량계의 질량 유량과 H 간에는 선형적 관계를 보였다. 압력 탭의 개수 보다는 압력 탭의 직경이 TSB 차압유량계의 유량 특성에 더 큰 영향을 미쳤다.

• 한국철도학회논문집
• /
• 제10권5호
• /
• pp.563-568
• /
• 2007

디젤 엔진의 배기가스 유량을 측정하기 삼각 분리 막대형 차압유량계를 개발하였다. 3 종류의 삼각 막대형 차압유량계를 제작하였고 실험 평가하였다. 삼각 막대형 외부형상이 유선형에 가까울수록 차압유량계에서의 상류부 와 하류부의 차압이 감소하는 경향을 나타내었다. 삼각막대형 차압유량계를 사용하여 고온 및 상온 조건에서 유량 검정을 하였다. 고온 조건에서의 유량계 검정을 위해 버너를 제작하였다. 삼각막대형 상류부 및 하류부 간의 차압과 질량 유량의 실험식을 구했다. 또한 실험식은 기체 온도에 의한 보정을 포함하고 있다.

• 한국공작기계학회논문집
• /
• 제17권4호
• /
• pp.89-94
• /
• 2008

Differential pressure flow meters which have a shape of triangular separate bar(TSB) were tested for investigating the flow rate characteristics of the flow meters with varying the temperature of the gas flow. Three kinds of the triangular separate bar flow meters whose aerodynamic angles are different one another are used. The mass flow rate of the flow meters are evaluated using a non-dimensional parameter which includes the gas temperature, exhaust gas pressure and differential pressure at the flow meters, and atmospheric pressure. A burner system which is similar to gas turbine was used for raising the gas flow temperature. The burner system was operated with varying the air/fuel ratio by controlling both the fuel injection rate from the fuel nozzle and air flow rate from a blower. An empirical correlation between the mass flow rate at the TSB flow meter and the non-dimensional parameter was obtained. The empirical correlation showed linear relationship between the mass flow rate and the non-dimensional parameter H. Also, the mass flow rate characteristics at the TSB flow meter was affected by the gas temperature.

• 한국생산제조학회지
• /
• 제19권2호
• /
• pp.204-210
• /
• 2010

The inner structure of the triangular separate bar (TSB) was improved to enhance the productivity of the TSB flow meter by simplifying the machining process for making the flow meter. The cross section of upstream and downstream pressure chamber in the TSB was changed from triangle to circle, which make it possible to substitute the wire cutting by drilling in the process of machining the pressure chamber. The flow rate characteristics of the flow meters was calibrated with a laminar flow meter. Six kinds of flow meters whose diameters of pressure tap for measuring pressure of both upsteam and downstream pressure chamber were different one another were made. The effects of the pressure tap diameter on the flow rate characteristics of the TSB flow meter was little. The mass flow rate characteristics of the flow meters with increasing a non-dimensional parameter which includes the gas temperature, exhaust gas pressure and differential pressure at the flow meters and atmospheric pressure shows nearly linear relationship with a correlation coefficient of R=0.998.

• 한국안전학회지
• /
• 제25권2호
• /
• pp.1-6
• /
• 2010

Flow characteristics of differential pressure flow meters which have a shape of triangular separate bar (TSB) was investigated according to the machining conditions in pressure tapping holes. Diameter of the pressure taping holes is either 1.0 mm or 1.5 mm. Also, number of the pressure tapping holes are drilled either 9 or 17. The mass flow rate of the TSB flow meters are calibrated with a laminar flow meter by connecting them in line. The mass flow rate in the TSB flow meters are plotted with a non-dimensional parameter H which includes the gas temperature, exhaust gas pressure and differential pressure at the flow meters. An empirical correlation between the mass flow rate at the TSB flow meter and the non-dimensional parameter H was obtained. The empirical correlation showed highly linear relationship between the mass flow rate and the non-dimensional parameter H. The hole size of the pressure tapping holes has a bigger effect on the flow rate than the number of the tapping holes.