Author(s): Delgado Gustavo, Montenegro Julio, Erices Fabian
Linked Author(s): Gustavo A. Delgado
Keywords: Labyrinth, weirs, hydrodynamic, coefficient, upstream.
Abstract:
Today hydrology´s change affects the performance of original water structures; as a consequence, their design results are insufficient. The implementation of labyrinth weirs has been proven to be beneficial elements in water reservoir or water conducts because they increase the discharge in high events. This characteristic is an advantage because it can increase the body´s normal level of water to replace losses, while maintaining the same level of “high water”. This structure can also be applied to a new design too, so that some developing projects can bear this situation in the future. The first important characteristic of labyrinth weirs is the position of weirs segments in alternative position, looking in plant like teeth. It increases the effective length of discharge for the same channel width. However, various aspects in regard to the functions of these structures have not been investigated. .In simple cases, it is still advisable to carry out the study of the hydraulic operation in reduced physical models. The labyrinth weirs can present some problems because the hydrodynamic adaptation to the water flow depends on the construction requirements. In previous structures that use these elements, it has been found that nape interference occurs over the crest and disturbance flow zones happen along the weir. For these reasons, it is necessary to incorporate several characteristics like specific shapes and long apex. The purpose of this research is to implement a hydraulic device to reduce the nape interference effects and increase the discharge. For this reason, this study investigates this device as an equivalent to the physical geometric scale of a labyrinth weir. It is necessary to test various designs and optimizing the configuration. The values obtained from measurements of hydraulic head and flow transited, are processed to obtain the coefficients of discharge. This coefficient is a dimensionless value related to the characteristics of the weir and the flow rate. (2644, 57,281)
Year: 2017