نوع مقاله : مقاله پژوهشی
1 دانشکده مهندسی مکانیک، دانشگاه شاهرود،
2 دانشکده مهندسی مکانیک، دانشگاه شاهرود
عنوان مقاله [English]
Diaphragm \ pumps are \ positive \ displacement pumps \ which have many applications in the petrochemical, and gas industries. As an example, Infusion pumps can be mentioned which are highly regarded in the gas industry due to the good resistance against chemical fluids. Since the diaphragm pumps are composed of various mechanical parts, some of which, such as the diaphragm, are in direct contact with the fluid, many different causes of mechanical damage are reported from some consumer companies such as Gas Company for this purpose, finding a model similar to the actual model is very useful. One of these pumps design and manufacturing methods is using commercial codes for simulation rather sophisticated and expensive laboratory methods. Since the fluid in the pump is transmitted by a diaphragm motion, the concept called the fluid structure interaction is defined due to the problems related to simulations of fluid structure interaction, animated network simulation, and geometry of the pumps, limited deal of efforts has been done in the past for numerical analysis of these pumps. Today, with significant progress made in the development of computational systems and commercial codes, a good platform for the simulation of such problems is created. There are several methods for simulating fluid structure interaction problems; one-way method is selected for this simulation due to the small deformation of the diaphragm and flow fields in front of other aspects of the model pump. In order to reduce the size of the pump dimensional model calculations, this pump is simulated using ANSYS CFX commercial code. We have generated a model that could well show some parameters of this type of pump, and so, a more efficient model can be produced by reduced construction costs via future studies. One of the results of the presented method, is introducing one-way fluid structure interaction method as a suitable modeling method. The other results worthy of being mentioned are the study on the velocity and pressure fields, the effects of functional parameters such as engine speed and displacement diaphragm pump on stream, and other outcomes that are fully addressed in a season. In order to validate the model the boundary conditions of a real sample fluid injection pump, odorant in city gas company, is used; that after comparing the amount of output in terms of displacement diaphragm with the information contained in the pump catalog, in the worst case, error rate turns out to be 10\%, and an average error is about 5\%.