ESDU 85032
Ejectors and jet pumps. Design and performance for incompressible liquid flow.
Abstract:
ESDU 85032 provides procedures for the design and performance prediction of ejectors and jet pumps where both the primary and secondary streams are liquid.The first procedure obtains an optimum design for a required duty, and the second predicts performance of an existing ejector so as to study the effect of minor changes. The methods are based on one-dimensional flow theory, supplemented by empirical correlations for the losses within the nozzles and mixing duct, and the equations are detailed. Extensive design charts are included, and flowcharts guide the user through the simple step-by-step procedures which are illustrated by three detailed practical worked examples. Guidance is provided on the use of annular- or multi-nozzle arrangements, various mechanical aspects, and on the performance prediction of ejectors for gas flow, and on the avoidance of cavitation.See ESDU 93022 for a Fortran program of the calculation methods.Indexed under:
Details:
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This Data Item contains 65 interactive graph(s) as listed below.
| Graph | Title |
|---|---|
| Figure 1 | Effect of viscosity on jet pump characteristic curve |
| Figure 2a | Variation of Kp with Reynolds number |
| Figure 2b | Variation of Ks with Reynolds number |
| Figure 2c | Mixing duct loss coefficient versus duct relative roughness |
| Figure 3a - Part 1 | Variation of optimum area ratio with flow and pressure ratios, for a density ratio of 1.0 |
| Figure 3a - Part 2 | Variation of optimum area ratio with flow and pressure ratios, for a density ratio of 1.0 |
| Figure 3a - Part 3 | Variation of optimum area ratio with flow and pressure ratios, for a density ratio of 1.0 |
| Figure 3b - Part 1 | Effect of density ratio on variation of optimum area ratio with flow ratio |
| Figure 3b - Part 2 | Effect of density ratio on variation of optimum area ratio with flow ratio |
| Figure 4a - Part 1 | Performance prediction curve |
| Figure 4a - Part 2 | Performance prediction curve |
| Figure 4b - Part 1 | Performance prediction curve |
| Figure 4b - Part 2 | Performance prediction curve |
| Figure 4c - Part 1 | Performance prediction curve |
| Figure 4c - Part 2 | Performance prediction curve |
| Figure 4d - Part 1 | Performance prediction curve |
| Figure 4d - Part 2 | Performance prediction curve |
| Figure 4e - Part 1 | Performance prediction curve |
| Figure 4e - Part 2 | Performance prediction curve |
| Figure 4f - Part 1 | Performance prediction curve |
| Figure 4f - Part 2 | Performance prediction curve |
| Figure 4g - Part 1 | Performance prediction curve |
| Figure 4g - Part 2 | Performance prediction curve |
| Figure 4h - Part 1 | Performance prediction curve |
| Figure 4h - Part 2 | Performance prediction curve |
| Figure 4i - Part 1 | Performance prediction curve |
| Figure 4i - Part 2 | Performance prediction curve |
| Figure 4j - Part 1 | Performance prediction curve |
| Figure 4j - Part 2 | Performance prediction curve |
| Figure 4k - Part 1 | Performance prediction curve |
| Figure 4k - Part 2 | Performance prediction curve |
| Figure 4l - Part 1 | Performance prediction curve |
| Figure 4l - Part 2 | Performance prediction curve |
| Figure 4m - Part 1 | Performance prediction curve |
| Figure 4m - Part 2 | Performance prediction curve |
| Figure 4n - Part 1 | Performance prediction curve |
| Figure 4n - Part 2 | Performance prediction curve |
| Figure 4o - Part 1 | Performance prediction curve |
| Figure 4o - Part 2 | Performance prediction curve |
| Figure 4p - Part 1 | Performance prediction curve |
| Figure 4p- Part 2 | Performance prediction curve |
| Figure 4q - Part 1 | Performance prediction curve |
| Figure 4q - Part 2 | Performance prediction curve |
| Figure 4r - Part 1 | Performance prediction curve |
| Figure 4r - Part 2 | Performance prediction curve |
| Figure 4s - Part 1 | Performance prediction curve |
| Figure 4s - Part 2 | Performance prediction curve |
| Figure 4t - Part 1 | Performance prediction curve |
| Figure 4t - Part 2 | Performance prediction curve |
| Figure 5 | Effect of Kp on variation of optimum pressure ratio with area ratio |
| Figure 6a | Effect of density ratio |
| Figure 6b | Effect of density ratio |
| Figure 7a - Part 1 | Results for example 1 |
| Figure 7a - Part 2 | Results for example 1 |
| Figure 7b - Part 1 | Results for example 1 |
| Figure 7b - Part 2 | Results for example 1 |
| Figure 7c - Part 1 | Results for example 1 |
| Figure 7c - Part 2 | Results for example 1 |
| Figure 8a - Part 1 | Bespoke design curves |
| Figure 8a - Part 2 | Bespoke design curves |
| Figure 8b - Part 1 | Bespoke design curves |
| Figure 8b - Part 2 | Bespoke design curves |
| Figure 9a - Part 1 | Results for example 3. Performance prediction curve |
| Figure 9a - Part 2 | Results for example 3. Performance prediction curve |
| Figure 9b | Results for example 3. Engine operating curve |