Abstract
The tools and methods used in the measurement of water flow velocity are now very diverse, such as by using Venturi Meter, Orifice, Current Meter, Pitot Tube, and so forth. To learn more about water flow velocity measurement method, in order to improve professionalism in the field of water resources can be done research at Hydraulics Laboratory by researching Water Flow Analysis by Using Pitot Tubes. The research process will be carried out using three varied channel basis samples: reviewing the velocity of the water flow at the bottom of the channel with slippery base, reviewing the flow rate of the water on the gravel base channel, and reviewing the flow rate of the water on the channel with the decking concrete base. The expected result of this research is knowing the distribution of velocity in a cross section such as drainage channel, irrigation channel and river, so construction of water structure can be adjusted position placement in the open channel section. In addition it can be used as a reference in planning an open channel. One of the benefits to construction cofferdam construction speed distribution is to determine the dewatering system to be carried out during construction.Keywords— Flow Speed, Speed Distribution. Channel Basic Variations
Highlights
Abstrak— Alat dan metode yang digunakan dalam pengukuran kecepatan aliran air kini sudah sangat beragam, diantaranya yaitu dengan menggunakan Venturi Meter, Orifice, Current Meter, Pitot Tube, dan lain sebagainya
The tools and methods used in the measurement of water flow velocity are
The expected result of this research is knowing the distribution of velocity in a cross section
Summary
Di era seperti sekarang ini, perkembangan ilmu pengetahuan di segala aspek kehidupan juga terus terjadi. Dengan adanya suatu permukaan bebas dan gesekan di sepanjang saluran maka kecepatan dalam saluran tidak terbagi merata dalam penampang saluran. Parameter aliran seperti laju atau kecepatan, tekanan, temperatur, serta laju aliran volumetrik (debit) atau laju aliran massa [3], dalam suatu sistem fluida adalah hal yang perlu diketahui. Pengukuran aliran adalah sebuah ilmu yang membahas koefisien, karena kita umumnya menerapkan persamaan Bernoulli untuk aliran zat cair dan persamaan energi aliran steady untuk aliran gas isontropik (dalam masing-masing kasus fluida diandaikan tanpa gesekan) dan kemudian membandingkan perilaku fluida sejati (viskous) dengan fluida ideal melalui perbandingan koefisienkoefisien kecepatan atau debit [5],[7]. Dalam gambar di bawah ini sebuah tabung kaca atau jarum suntik dengan belokan siku-siku dipergunakan untuk mengukur kecepatan v di dalam suatu saluran terbuka. Tekanan dinamik dihubungkan dengan tinggn, yaitu tekanan statik h0 dan tekanan dinamik ∆h, yi-kecepatan oleh persamaan di atas
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