LAB REPORT ON HYDRAULIC JUMP

Lab Report 3 TABLE OF CONTENT CONTENT PAGE  ABSTRACT 3  INTRODUCTION 3  AIMS / OBJECTIVE 3  THEORY 3-4  MATERIAL 5  METHOD 6  RESULTS 7-9  CALCULATION 9-11  DISCUSSION 11  CONCLUSION 12  RECOMMENDATION 12  LITERATURE CITED 13  APPENDICES 14 2 Lab Report 3 ABSTRACT: The vast applications of hydraulic jumps are of great importance in civil engineering especially in water resources engineering. Hydraulic Jumps are usually used as energy dissipaters and their turbulent actions are used for mixing chemicals for treatment of water. The characteristics of hydraulic jumps are described by the conjugate depth equation. Hence, the goal of this experiment was to verify the validity of the conjugate depth equation and investigate the head loss developed during jumps. In this experiment the properties of a hydraulic jump and energy dissipation were studied. The jumps formation was controlled by a sluice gate at the upstream and a suppressed weir at the downstream in a rectangular channel. The heights of the jumps were measured at two different sections using a point gauge. Beside the study of the properties of a hydraulic jump, the relationship between the depth and the specific energy under constant discharge was also investigated. The Froude number was calculated for both the sections in order to confirm the type of flow before and after the hydraulic jump. It was found that the hydraulic jump only occurs when the flow changes from supercritical to subcritical. INTRODUCTION OBJECTIVES 1. To observe a hydraulic jump. 2. To understand the relationship between the depth and the specific energy under constant discharge. 3. To understand the relationship between the Froude number of flow in the upstream of the hydraulic jump. 4. To estimate the head loss due to hydraulic jump. 5. To create a hydraulic jump and verify equations of fluid flow. 3 Lab Report 3 MATERIALS: 1. An adjustable-slope rectangular open channel with point gauges. 2. A steady water supply system. 3. A V-notch with hook gauge. 4. A sluice gate with rubber packing. 5. An adjustable-height suppressed weir. 6. A steel tape measure. 7. A thermometer METHOD: 1. The sluice gate on the open channel was put and the rubber packing’s in the space between the gate and the channel wall was also put. 2. The horizontal channel was set. 3. The width of the channel was measured with a steel tape measure and the channel bed levels at section 1 (about 0.5m downstream of the gate) and at section 2 (about 1.5m downstream of the gate) with the point gauge was measured also. 4. The temperature of water was measured. 5. The crest level of the V-not