Blade Excitation in Pulse-Charged Mixed-Flow Turbocharger Turbines

Senn, Stephan M.; Seiler, Martin; Schaefer, Ottmar

doi:10.1115/1.4001186

Cited by 5 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pita CM [7], Pironkov P [8], and Takizawa K [9] wrote the corresponding procedures in their papers to study the deformation and stress distribution of two-dimensional circular tubes and flat plates under high temperature fluids by means of flow thermo-coupling. Senn SM et al [10] predicted the interaction of fluid and structure in a turbocharger. Ricet T [11] used numerical simulation of the blade flutter problem under the high flow condition of the extremely long rotating blade of steam turbine, and analyzed the cause of unstable aero dynamics.…”

Section: Introductionmentioning

confidence: 99%

Study on Flow Field and Rotor Safety Characteristics of MSPs Based on Flow Thermo-Coupling

Chen

Zhu

et al. 2019

Processes

View full text Add to dashboard Cite

In order to obtain the structural intensity under the operation conditions of MSP (molten salt pump), the rotor component of MSP is taken as the research object. In this paper, the influence of material properties change on the structural performance of MSP at different temperatures is analyzed. The stress distribution and strain distribution of MSP rotor components under different loads are investigated, and the intensity calculation of MSP rotor system is carried out to explore whether it meets the intensity requirements under high temperature operation, which lays a foundation for the high temperature test of MSP. The results show that the maximum deformation position of the blade working face appears at the outer edge of the impeller. When the fluid-structure coupling is applied, the blade strain law and the strain law during thermo-coupling are similar. The effect of the temperature field on the degree of blade deformation is not significant, provided that other factors remain the same. The position where the impeller equivalent stress is the largest is mainly concentrated in the area where the blade is in contact with the front and rear cover plates at the outlet of the impeller. Different degrees of stress concentration occur in the area where the blade is in contact with the impeller hub. The distribution law of the equivalent stress on the surface of the impeller cover plate is that the equivalent stress value changes periodically along the circumferential direction of the impeller, and the number of change cycles is equal to the number of impeller blades. This study can provide a reference for the structural design of MSPs.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on Flow Field and Rotor Safety Characteristics of MSPs Based on Flow Thermo-Coupling

Chen

Zhu

et al. 2019

Processes

View full text Add to dashboard Cite

show abstract

An investigation of the effects of volute A/R distribution on radial turbine performance

Chen

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

In order to meet the higher design requirements of radial turbines, it is necessary to clearly understand the impact of different design parameters on turbine performance. The A/R distribution is one of the most important design parameters for the radial turbine volute, but there are few studies on it. To clarify the effect of A/R distribution on turbine efficiency and blade excitation force, a detailed comparative study is carried out. An experimentally validated numerical method is used, and steady and unsteady CFD simulations are conducted in this study. The results show that the volute A/R distribution has a significant effect on the turbine efficiency, while a linear distribution can provide a more uniform inlet condition and thus improve the rotor efficiency. The flow parameters fluctuated significantly at the volute tongue. Although the efficiency is not sensitive to this fluctuation, it directly affects the excitation force on the rotor blades. The volute with S-shaped A/R distribution produces the smallest excitation force due to the smallest fluctuation. Two new A/R distributions are presented which combine the advantages of linear and S-shaped or convex A/R distributions with high efficiency and low excitation force. It is suggested that the A/R should be close to the linear distribution and decreases rapidly before the tongue.

show abstract

An Investigation of the Performance and Internal Flow of Variable Nozzle Turbines with Split Sliding Guide Vanes

Yang

Wang

et al. 2022

Machines

View full text Add to dashboard Cite

In order to effectively weaken the leakage flow and shock intensity of traditional “swing” type guide vanes in a variable nozzle turbine, a new flow control device named the “split sliding guide vane” (SSGV) is studied in the present work. Steady and unsteady calculations were carried out on both the SSGV and base model at 10%, 40%, and 100% open positions. The shock test was performed to verify the accuracy of the numerical method. The results showed that at 10%, 40%, and 100% open positions, the leakage flow of the SSGV was 43%, 51%, and 40% of that of the base model, respectively. When 10% open, the turbine efficiency increased by 12%, compared with the base model, since the SSGV could effectively inhibit the clearance leakage flow. Due to the increased distance between the rotor and guide vane, the shock intensity of the SSGV was only 52% of that of the base model when 40% was open. The SSGV could reduce the static pressure loss on the guide vane pressure surface, but for the guide vane suction surface, the static pressure distribution appeared in a “W” shape due to the influence of the vane profile. Finally, the flow in the rotor was studied, which showed that the weakening of the shock and reduction of the clearance leakage flow in the guide vane were also beneficial for the strength of downstream rotor blades.

show abstract

Blade Excitation in Pulse-Charged Mixed-Flow Turbocharger Turbines

Cited by 5 publications

References 11 publications

Study on Flow Field and Rotor Safety Characteristics of MSPs Based on Flow Thermo-Coupling

Study on Flow Field and Rotor Safety Characteristics of MSPs Based on Flow Thermo-Coupling

An investigation of the effects of volute A/R distribution on radial turbine performance

An Investigation of the Performance and Internal Flow of Variable Nozzle Turbines with Split Sliding Guide Vanes

Contact Info

Product

Resources

About