Detailed Flow Measurements and Predictions for a Three-Stage Transonic Fan

1994 ◽  
Vol 116 (2) ◽  
pp. 298-305 ◽  
Author(s):  
W. J. Calvert ◽  
A. W. Stapleton
Keyword(s):  
Shock Waves ◽  
Computational Efficiency ◽  
Three Dimensional ◽  
Internal Flow ◽  
Design Tool ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Overall Performance ◽  
Calculation System ◽  
Transonic Fan

Detailed flow measurements were taken at DRA Pyestock on a Rolls-Royce three-stage transonic research fan using advanced laser transit velocimetry and holography techniques to supplement the fixed pressure and temperature instrumentation. The results have been compared with predictions using the DRA S1-S2 quasi-three-dimensional flow calculation system at a range of speeds. The agreement was generally encouraging, both for the overall performance and for details of the internal flow such as positions of shock waves. Taken together with the computational efficiency of the calculations and previous experience on single-stage transonic fans and core compressors, this establishes the S1-S2 system as a viable design tool for future multistage transonic fans.

scholarly journals Detailed Flow Measurements and Predictions for a Three-Stage Transonic Fan

1993 ◽  
Author(s):  
W. John Calvert ◽  
Andrew W. Stapleton
Keyword(s):  
Shock Waves ◽  
Computational Efficiency ◽  
Internal Flow ◽  
Design Tool ◽  
Previous Experience ◽  
3D Flow ◽  
Flow Measurements ◽  
Overall Performance ◽  
Calculation System ◽  
Transonic Fan

Detailed flow measurements were taken at DRA Pyestock on a Rolls-Royce three-stage transonic research fan using advanced laser transit velocimetry and holography techniques to supplement the fixed pressure and temperature instrumentation. The results have been compared with predictions using the DRA S1-S2 quasi-3D flow calculation system at a range of speeds. The agreement was generally encouraging, both for the overall performance and for details of the internal flow such as positions of shock waves. Taken together with the computational efficiency of the calculations and previous experience on single-stage transonic fans and core compressors, this establishes the S1-S2 system as a viable design tool for future multistage transonic fans.

scholarly journals A Quasi-Three Dimensional Calculation System for the Flow Within Transonic Compressor Blade Rows

1985 ◽  
Author(s):  
W. J. Calvert ◽  
R. B. Ginder
Keyword(s):  
Data Transfer ◽  
Three Dimensional ◽  
Internal Flow ◽  
Compressor Blade ◽  
Meridional Plane ◽  
End Effects ◽  
Transonic Compressor ◽  
Calculation System ◽  
Set Up ◽  
Transonic Fan

A calculation system has been set up to predict both the internal flow field and the overall performance of a transonic compressor blade row. The system iterates between an inviscid-viscous time-marching blade-to-blade (S1) treatment and a streamline curvature throughflow calculation for the pitchwise-averaged flow in the meridional plane (S2). A blade geometry package and a data transfer/display program are used to link the S1 and S2 methods to give a semi-automatic convergence procedure. The only empirically-based correlation or correction required is an extra loss imposed near the blade hub and tip to allow for end effects. The system has been applied to a high bypass ratio transonic fan rotor near design point. The converged solution was in good agreement with the measured performance.

The Design of an Advanced Civil Fan Rotor

1987 ◽  
Vol 109 (3) ◽  
pp. 340-345 ◽  
Author(s):  
R. B. Ginder ◽  
W. J. Calvert
Keyword(s):  
High Efficiency ◽  
Three Dimensional ◽  
Internal Flow ◽  
Blade Profile ◽  
Transonic Compressor ◽  
Blade Row ◽  
New Type ◽  
Overall Performance ◽  
Calculation System ◽  
Asme Paper

A recent ASME paper by the authors described a quasi-three-dimensional calculation system for transonic compressor blade rows. The system predicts both the internal flow field and the overall performance of the blade row. It therefore enables the compressor engineer to optimize the blade shapes in order to improve the design point efficiency. This is explored in the present paper. A new type of blade profile has been developed to allow sufficient freedom for the optimization. Application to the design of a high-efficiency, transonic civil fan rotor is discussed.

Three-dimensional flow measurements in a static mixer

AIChE Journal ◽  
2012 ◽  
Vol 59 (5) ◽  
pp. 1746-1761 ◽  
Author(s):  
R. T. M. Jilisen ◽  
P. R. Bloemen ◽  
M. F. M. Speetjens
Keyword(s):  
Three Dimensional ◽  
Static Mixer ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Dimensional Flow

Reynolds Number Effects on the Performance Characteristic of a Small Regenerative Pump

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
Shin-Hyoung Kang ◽  
Su-Hyun Ryu
Keyword(s):  
Reynolds Number ◽  
Three Dimensional ◽  
Internal Flow ◽  
Reynolds Numbers ◽  
Maximum Efficiency ◽  
Three Dimensional Flow ◽  
One Dimensional ◽  
Rotating Speed ◽  
Dimensional Modeling ◽  
Reynolds Number Effects

This paper studies the effect of the Reynolds number on the performance characteristics of a small regenerative pump. Since regenerative pumps have low specific speeds, they are usually applicable to small devices such as micropumps. As the operating Reynolds number decreases, nondimensional similarity parameters such as flow and head coefficients and efficiency become dependent on the Reynolds number. In this study, the Reynolds number based on the impeller diameter and rotating speed varied between 5.52×103 and 1.33×106. Complex three-dimensional flow structures of internal flow vary with the Reynolds numbers. The coefficients of the loss models are obtained by using the calculated through flows in the impeller. The estimated performances obtained by using one-dimensional modeling agreed reasonably well with the numerically calculated performances. The maximum values of flow and head coefficients depended on the Reynolds number when it is smaller than 2.65×105. The critical value of the Reynolds number for loss coefficient and maximum efficiency variations with Reynolds number was 1.0×105.

Three-Dimensional Flow Calculations of the Stator in a Highly Loaded Transonic Fan

1998 ◽  
Vol 120 (1) ◽  
pp. 141-146 ◽  
Author(s):  
P. R. Emmerson
Keyword(s):  
Three Dimensional ◽  
Flow Visualisation ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Efficiency Condition ◽  
Flow Effects ◽  
High Level ◽  
Transonic Fan ◽  
Very High ◽  
Highly Loaded

A three-dimensional viscous solver has been used to model the flow in the stator of a highly loaded single-stage transonic fan. The fan has a very high level of aerodynamic loading at the hub, which results in a severe hub endwall stall. Prediction of the flow at the 100 percent speed, peak efficiency condition has been carried out and comparisons are made with experiment, including stator exit traverses and fixed blade surface pressure tappings and flow visualisation. Comparisons are also made with an analysis of the rotor and stator rows using the DERA S1–S2 method. The three-dimensional predictions show good qualitative agreement with measurements in all regions of the flow field. Quantitatively the flow away from the hub region agreed the best. The general trends of the severe hub endwall stall were predicted, although the shape and size did not match experiment exactly. The S1–S2 system was unable to predict the hub endwall stall, since it arises from fully three-dimensional flow effects.

scholarly journals Extended Calibration Technique of a Four-Hole Probe for Three-Dimensional Flow Measurements

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Suresh Munivenkatareddy ◽  
Nekkanti Sitaram
Keyword(s):  
Three Dimensional ◽  
Lower Sensitivity ◽  
Angular Range ◽  
Calibration Technique ◽  
Zonal Method ◽  
Three Dimensional Flow ◽  
Flow Measurements ◽  
Reduction Program ◽  
Left And Right ◽  
Calibration Coefficients

The present paper reports the development and nonnulling calibration technique to calibrate a cantilever type cylindrical four-hole probe of 2.54 mm diameter to measure three-dimensional flows. The probe is calibrated at a probe Reynolds number of 9525. The probe operative angular range is extended using a zonal method by dividing into three zones, namely, center, left, and right zone. Different calibration coefficients are defined for each zone. The attainable angular range achieved using the zonal method is ±60 degrees in the yaw plane and −50 to +30 degrees in the pitch plane. Sensitivity analysis of all the four calibration coefficients shows that probe pitch sensitivity is lower than the yaw sensitivity in the center zone, and extended left and right zones have lower sensitivity than the center zone. In addition, errors due to the data reduction program for the probe are presented. The errors are found to be reasonably small in all the three zones. However, the errors in the extended left and right zones have slightly larger magnitudes compared to those in the center zone.

Three-Dimensional Flow in a Highly Loaded Single-Stage Transonic Fan

1993 ◽  
Author(s):  
J. D. Bryce ◽  
M. A. Cherrett ◽  
P. A. Lyes
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Single Stage ◽  
Flow Visualisation ◽  
Flow Measurements ◽  
Design Speed ◽  
High Level ◽  
Transonic Fan ◽  
Test Module ◽  
Speed Characteristic

Tests have been conducted at DRA Pyestock on a single-stage transonic fan which has a very high level of aerodynamic loading at the hub. The objective of the tests was to survey the flow field in detail, with emphasis on studying the 3D viscous aspects of the flow. The test module was highly instrumented. Detailed flow traversing was provided at rotor and stator exit, and replaceable stator cassettes allowed various types of on-blade instrumentation to be fitted. The test rig and instrumentation are described and detailed flow measurements, taken at peak efficiency operation on the design speed characteristic, are presented. These measurements, which are supplemented by flow visualisation results, indicate the presence of a severe endwall corner stall in the stator hub flow field. The fan was modelled using the DRA S1-S2 method and these results are also discussed.

Sign in / Sign up

Export Citation Format

Share Document