Fluid-Thermal-Structural Coupled Analysis of a Radial Inflow Micro Gas Turbine Using Computational Fluid Dynamics and Computational Solid Mechanics

Abstract

A three-dimensional fluid-thermal-structural coupled analysis for a radial inflow micro gas turbine is conducted. First, a fluid-thermal coupled analysis of the flow and temperature fields of the nozzle passage and the blade passage is performed by using computational fluid dynamics (CFD). The flow and heat transfer characteristics of different sections are analyzed in detail. The thermal load and the aerodynamic load are then obtained from the temperature field and the pressure distribution. The stress distributions of the blade are finally studied by using computational solid mechanics (CSM) considering three cases of loads: thermal load, aerodynamics load combined with centrifugal load, and all the three types of loads. The detailed parameters of the flow, temperature, and the stress are obtained and analyzed. The numerical results obtained provide a useful knowledge base for further exploration of radial gas turbine design.

Fluid flow dynamics in MAS systems

“…[97][98][99][100][101] and a ''mesoscopic'' range rotor diameter up to 100 mm, e.g. [102][103][104][105][106][107]. The mesoscopic gas turbines are used for electrical power production aiming at an electrical power output of 100 W to 1 kW.…”

Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

“…There are a number of studies devoted to researching the effect of perforated plates on the hydrodynamics of gas and liquid flows. Particularly, the articles [1][2][3][4] deal with the coupled thermal, structural, and vibration analysis. Traditional approaches for measuring parameters of the gas flow in air distribution devices are investigated in the articles [5][6][7][8].…”

Effect of Thermal Barrier Coating on the Thermal Stress of Gas Microturbine Blades and Nozzles

“…Gas microturbines (GMT) are small turbomachines that work using gases at high temperatures, with power capacities ranging from 15 kW to 300 kW and offer variable speeds from 30,000 rpm up to 120,000 rpm [1]. They operate with the same operation principle of all the conventional gas turbines; therefore, the efficiency of these devices depends on the gas temperature, which can become higher than 1000 K [2] and [3]. Blades and nozzles of the turbines are subjected to different loads like high temperature, corrosion, centrifugal forces, etc., which could lead to failures [4] and [5].…”