Hasil Pencarian  ::  Simpan CSV :: Kembali

"Kegiatan praktikum merupakan salah satu wadah pendekatan ilmiah, untuk mengembangkan pemahaman konsep ilmu sains dan teknologi. Perancangan, manufaktur, dan pengujian alat praktikum pengukuran laju aliran fluida berbasis pelat orifice bertujuan untuk mendapatkan serta menganalisis nilai coefficient of discharge dan ketidakpastiannya dengan membandingkan hasil coefficient of discharge yang didapat dengan literatur yang ada. Adapun, pelat orifice yang ada pada alat pratikum akan memberikan perbedaan tekanan pada pada aliran, yang diperlihatkan melalui perbedaan ketinggian pada manometer multitube. Fluida yang akan diuji adalah air dengan batasan memiliki viskositas nol, tidak dapat dimampatkan dan kecepatan yang seragam.Berdasarkan pengujian ini, data berupa perbedaan ketinggian akan diolah menggunakan persamaan-persamaan empiris sehingga didapatkan hasil yakni nilai laju aliran teoretis, coefficient of discharge, serta bilangan Reynolds (Re). Visualisasi hasil pengolahan akan dituangkan dalam grafik hubungan antara bilangan Re dengan coefficient of discharge. Nilai coefficient of discharge pada alat praktikum pengukuran debit aliran dengan menggunakan pelat orifice adalah sebesar 0.66.......Practical activities are one of the methods in science teaching to develop an understanding of the concepts of science and technology. The aim of developing a practical tool for calculating fluid flow rates based on orifice plates is to obtain and analyze the value of discharge coefficient and its uncertainty and comparing the value of the results obtained with the existing literature. An orifice plate on the practical instrument will create a differential pressure in the flow, which will be shown on the multitube manometer as a differential height. The fluid utilizied is water, and some of the parameters for this tool are that the stream’s viscosity is zero, not compressed, and it has a uniform velocity.Based on the results of the test, the data obtained in the form of differential height will be processed further using empirical equations derived from the processing outcomes. The findings will be shown by a graph depicting the relationship between the Reynolds number and the discharge coefficient. The practical tool for measuring flowrate utilizing orifice plate has a discharge coefficient of 0.66. "

"Most of the existing water gates in Indonesia was made of iron or/and wood. Both materials are relatively easy to rusted , damaged or decayed and also attractive to be stolen. Alternative material and design was needed to overcome this issues. This study aim to design water gates using alternative material rather than iron.i.e GFRP (Glass Fiber Reinforced Plastics). This material has several advantages compared to the other material [such as metal] especially its weight, strength and price. The gate in this study was designed for width of 50 cm and 120 cm. Estimated optimal thickness for these width respectively 12 and 30 mm. Mechanical strength testings were conducted according to the Japanese Industrial standard for flexural strength. Testing conducted on two tipes of samples that have different thicknesses, i.e 12 mm and 30 mm. The average density of sample was 1,5 gr/cm, sample with 12 mm and 30 mm thickness reach fexural strength respectively about 200 kg/cm and 299 kg/cm at 10 mm strain. This result comply mechanical strenght requirement for water gate. Thus, recommended thickness for GFRP water gate was thicker than estimated,i.e was 10 mm for width of 50 am and 20 mm for width of 120 cm. The GFRP water gate with round shape in the bottom has contraction coefcient (c)= 0,951 and a value of dischage coefcient (c) can be determined by C=C {h-w); with ko =15 and K1=0,062"