Hydraulics and Pneumatics: Unit I: Fluid Power Priniciples and Hydraulic Pumps
fluid flow
Fluid Power Priniciples and Hydraulic Pumps - Hydraulics and Pneumatics
As we know, the hydraulic system is concerned with the flow of a liquid through a pipe. The two important types of flow are:
FLUID FLOW As we know, the hydraulic system is concerned with the flow of a liquid through a pipe. The two important types of flow are: 1. Laminar flow, and 2. Turbulent flow. • A laminar flow is one in which paths taken by the individual particles do not cross one another and move along well defined paths, as shown in Fig.3.11. • The laminar flow is characterized by the fluid flowing in smooth layers of laminae. • This type of flow is also known as streamline or viscous flow, because the particles of fluid moving in an orderly manner and retaining the same relative positions in successive cross-sections. In fact, these fluid flows are first demonstrated by Osborne Reynold's in 1883 through an experiment (known as Reynold's experiment). • Examples: (i) Flow of oil in measuring instruments. (ii) Flow of blood in veins and arteries. (iii) Rise of water in plants through their roots. • A turbulent flow is that flow in which fluid particles move in a zig-zag way, as shown in Fig.3.12. • The turbulent flow is characterized by continuous small fluctuations in the magnitude and direction of the velocity of the fluid particles. • Causes: The turbulence in the fluid may cause: (i) More resistance to flow, (ii) Greater energy loss, and (iii) Increased fluid temperature due to greater energy loss. • Examples : High velocity flow in a pipe of large size. Nearly all fluid flow problems encountered in engineering practice have a turbulent character.1. Laminar Flow
2. Turbulent Flow
Hydraulics and Pneumatics: Unit I: Fluid Power Priniciples and Hydraulic Pumps : Tag: : Fluid Power Priniciples and Hydraulic Pumps - Hydraulics and Pneumatics - fluid flow
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Hydraulics and Pneumatics
ME3492 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation