Static Strength Assessment of the Water Vapor separator

*Figure 1. 3D CAD model of the water vapor separator.*

#### Intoduction

In according to conceptual design of a **Water Vapor Separator (WVS)** FEA Engineering was asked to perform strength calculation of intitial design. Assembly drawing and 3D model of WVS shown in Figures 1 - 3.

To check strength and deformation of issued design finite element model (FEM) was prepared (Figure 4).

*Figure 4. Finite element model of the WVS: a) general view; b) section cut.*

#### Loads and constraints

WVS normally operates under the following conditions:

- internal pressure
- vapor temperature

Structural constraints were applied near connection flanges as shown in Figure 4.

Pressure and temperatures were applied to FEM as shown in Figures 5.

Operational conditions, including pressure pulsating loads, have been determined from CFD calculation report. Pressure distribution and pulsating in low frequency domain are shown in Figures 6 and 7.

*Figure 5. Load application visualization: a) internal pressure on elements; b) nodal temperatute.*

*Figure 6. Presure distribution at long section cut of WVS.*

*Figure 7. Presure pulsating in low frequency domain.*

#### Occured results and conclusions

FEM analysis shown that safety factors (less than 1.0) for all analyzed LC's did not exceed allowable value. Safety factors distribution is shown in Figure 8.

Max. displacement for the worst LC is about 7 mm which is acceptable for chosen thermal compensators. Displacement distribution is shown in Figure 9.

*Figure 8. Safety factors distribution.*

*Figure 9. Displacement distribution in VWS structure.*

*Figure 2. Assembly drawing.*

*Figure 3. Midsection drawing.*