The Density and Momentum Distributions of 2-Dimensional Transonic Flow in an LP-Steam Turbine

Abstract

Within turbine blade rows, particularly for cascades of high deflection angle, cross-channel gradients of steam properties may be appreciable. To determine the effects on spontaneous condensation of gradients of supersaturation normal to streamlines, the conservation equations can be incorporated in a two dimensional calculation procedure. With the help of program FORTRAN 90 a developed computational program of calculations is accomplished, whose results are communicated to the pressure and Mach number distribution, direction of flow and streamlines in the field and the drops distribution in the outlet of the stator blade mesh. The procedure contains a program section, which avoids difficulties in the strongly curved profile of the leading and trailing edge by a developed computational mesh construction.

Liquid–Solid Impact Mechanism, Liquid Impingement Erosion, and Erosion-Resistant Surface Engineering: A Review

“…As a result, the power generation and aerospace sectors are keen to understand more about WDE and how to minimize the damage it causes. [42] with permission (Copyright Elsevier 1990)) and (b) severe water droplet erosion on the suction side of steam turbine blades [43].…”

“…The study plan is to review the following topics in order: a. the low-speed liquid-solid impact b. the high-speed liquid-solid impact c. the liquid impingement erosion of metals d. the erosion-mitigation materials and techniques It is apparent that understanding the low-speed droplet impact dynamics is beneficial because it provides fundamental insights into the nature of high-speed droplet impact. Therefore, the low-speed droplet impact is discussed before the high-speed droplet [42] with permission (Copyright Elsevier 1990)) and (b) severe water droplet erosion on the suction side of steam turbine blades [43].…”

“…Numerous studies on the dynamics of droplet impact are mostly related to its inevitable effect in nature and industrial applications such as inkjet technology [44], thermal spray coating [45][46][47][48][49][50], and cooling systems [51,52]. For instance, as mentioned, a continuous droplet impact on steam turbine blades results in erosion [20,38,42,43] and wear or ice accretion that can compromise the safety of aircraft [53,54]. Various physical scenarios can arise upon the impact of a liquid droplet on a solid surface, such as spreading, fingering, deposition, receding, bouncing, and splashing [52,55].…”