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Engineering · Mechanical Engineering
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Rajah 4lFigure 4

Rajah 4 di bawah menunjukkan suatu bekas besar di mana air yang terkandung di dalamnya sedang mengalir keluar melalui suatu lubang kecil di bawah graviti. Aliran adalah mantap dan kadar aliran jisim m (kg/s) dianggap bergantung kepada halaju keluar v, pecutan gravity g, kedalaman cecair h, ketumpatan ρ dan garispusat lubang d. Figure 4 below shows a large container where the liquid within it is flowing out through a small hole under the action of gravity. The flow is steady and the mass flow rate m (kg/s) is assumed to depend on the exit velocity v, gravitational acceleration g, depth of liquid h, density p and diameter of the hole d a) Dengan menggunakan analisis dimensi, tentukan kumpulan-kumpulan tak Using dimensional analysis, determine the dimensionless groups that govem the (10 markah/marks) b) Satu ujian akan dijalankan dengan suatu model skala . Untuk mencapai berdimensi yang mempengaruhi kelakuan aliran ini behavior of this flow keserupaan dinamik penuh, kirakan nisbah di antara kadar aliran jisim model dan A test is to be made on a 4 scale model. In order to achieve full dynamic similarity, (5 markah/marks) kadar aliran jisim prototaip. calculate the ratio between the model mass flow rate and the prototype mass flow rate

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