Control of Surge in Centrifugal Compressor by Using a Nozzle Injection System: Universality in Optimal Position of Injection Nozzle

Hirano, Tôru; Uchida, Takane; Tsujita, Hoshio

doi:10.1155/2012/259293

Cited by 7 publications

(4 citation statements)

References 8 publications

(6 reference statements)

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“…. +1.5% +20% [200] 2012 Injection nozzle CC 2-11% ±0% +20% [176] 2007 Injection nozzle AC 0.15% +9% [176] 2007 Injection nozzle CC 0.9% +10% [201] 2005 Injection nozzle CC 0.9-4.6% ±0% ±0% [202] 2004 Injection nozzle CC 0.5% +25% [178] 2003 Injection nozzle CC 0.9% −1% +15% [178] 2003 Bleed control tube CC −5.5% +56%…”

Section: Injection Suction and Recirculationmentioning

confidence: 99%

“…Figure 12 shows a schematic view of the injection nozzle in the impeller inducer, where the high-momentum fluid is circulated from, e.g., the compressor outlet. Hirano et al [200] proposed that the optimum circumferential position for a single injector is on the opposite side of the volute tongue. For double injection, the optimum circumferential position for the first injection is between the volute tongue and the location at 30 • to the rotational direction when the second injection is located at 135 • from the tongue against the rotational direction, resulting in a 30% increase in surge margin [193].…”

Section: Injection Suction and Recirculationmentioning

confidence: 99%

See 1 more Smart Citation

Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review

Tiainen

Grönman

Jaatinen-Värri

et al. 2017

IJTPP

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Abstract:The decrease in the performance of centrifugal compressors operating at low Reynolds numbers (e.g., unmanned aerial vehicles at high altitudes or small turbomachines) can reach 10% due to increased friction. The purposes of this review are to represent the state-of-the-art of the active and passive flow control methods used to improve performance and/or widen the operating range in numerous engineering applications, and to investigate their applicability in low-Reynolds-number centrifugal compressors. The applicable method should increase performance by reducing drag, increasing blade loading, or reducing tip leakage. Based on the aerodynamic and structural demands, passive methods like riblets, squealers, winglets and grooves could be beneficial; however, the drawbacks of these approaches are that their performance depends on the operating conditions and the effect might be negative at higher Reynolds numbers. The flow control method, which would reduce the boundary layer thickness and reduce wake, could have a beneficial impact on the performance of a low-Reynolds-number compressor in the entire operating range, but none of the methods represented in this review fully fulfil this objective.

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Section: Injection Suction and Recirculationmentioning

confidence: 99%

Section: Injection Suction and Recirculationmentioning

confidence: 99%

Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review

Tiainen

Grönman

Jaatinen-Värri

et al. 2017

IJTPP

View full text Add to dashboard Cite

show abstract

“…In the best result they got, they reduced the minimum flow rate at which the compressor could operate by 10%. Hirano et al [8,9] carried out experiments to find the optimum circumferential location of air injection from the impeller inlet to extend the operating range of a centrifugal compressor. They found that the optimal position was on the opposite side of the volute tongue.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Suction Flow Control on Centrifugal Compressor with Vaned Diffuser

Çadırcı

2022

Energies

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In this study, the effect of suction flow control on a centrifugal compressor at operation and stall flow rates was investigated using computational fluid dynamics (CFD). The compressor geometry was reconstructed from available open source profile data and the CFD analyses have been performed on this geometry using the appropriate mesh. To validate the CFD results, the compressor performance line was acquired and compared with the experimental results obtained at the design rotational speed. Then, suction flow control was employed at various suction slot positions with different suction flow rates to improve the performance of the compressor at operation and stall flow rates. As a result of the suction flow control trials, 0.85% increase in pressure ratio and 0.8% increase in adiabatic efficiency were achieved while the compressor was running at operation flow rate. The performance improvements corresponding to the stall flow rate of the compressor were 2.5% increase in pressure ratio and 2% increase in adiabatic efficiency.

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“…According to the mentioned sources, inlet distortion has adverse effects on the compressor performance, but different methods can be used to compensate for it. Some approaches to compressor performance improvement have been proposed in some studies (Stein et al 2000;Suder et al 2000;Iyengar et al 2005;Beheshti et al 2006;Khaleghi et al 2008a;Hirano et al 2012;Ma and Kim 2017;Yang et al 2017;Dong et al 2018;Taghavi-Zenouz and Behbahani 2018;Sun et al 2019;Li et al 2020;Li et al 2021;Wang et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Using Tip Injection to Stability Enhancement of a Transonic Centrifugal Impeller with Inlet Distortion

Jahani

Khaleghi

Tabejamaat

2022

JAFM

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This paper aims to understand the effects of circumferential inlet distortion and tip injection on a transonic impeller performance and flow field. For distorted inflow, the impeller is subjected to a stationary 120-degrees circumferential total pressure distortion. Full annulus unsteady three-dimensional analysis has been used to study the inlet distortion and tip injection effects on the impeller performance, stability and flow field. The results show that the circumferential inlet distortion reduces the impeller total pressure ratio and adiabatic efficiency; however, it has no significant impact on the safe operating range. Unlike the inlet distortion, the tip injection considerably increases the operating range. According to the results, the distortion and tip injection effect on the compressor performance is mainly due to changes in tip leakage flow. The inlet distortion has unfavorable influences on the flow field, especially near the impeller tip; however, the tip injection ameliorates the flow field in this region. In both the clean and distorted inflow, the tip injection causes downstream shock transmission, weakening the shock-tip leakage interaction. Hence, stall inception is postponed, and the impeller stability is improved in the presence of the tip injection.

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Control of Surge in Centrifugal Compressor by Using a Nozzle Injection System: Universality in Optimal Position of Injection Nozzle

Cited by 7 publications

References 8 publications

Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review

Flow Control Methods and Their Applicability in Low-Reynolds-Number Centrifugal Compressors—A Review

Investigation of Suction Flow Control on Centrifugal Compressor with Vaned Diffuser

Using Tip Injection to Stability Enhancement of a Transonic Centrifugal Impeller with Inlet Distortion

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