EN | 中文 | RU

gallery/fea_logo_2019
Strength Assessment of the Vapor Separator

Home  Projects  >  Water Vapor Separator

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.

a)

b)

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.

gallery/separator_fem_safety_factor_results

Figure 8. Safety factors distribution.

gallery/separator_3d_model
gallery/separator_fem_model
gallery/separator_fem_section_cut_model

a)

b)

gallery/separator_internal_pressure
gallery/separator_initial_temperature
gallery/separator_pressure_on_vane
gallery/separator_pressure_function_on_vane
gallery/separator_fem_translations

Figure 9. Displacement distribution in VWS structure.

gallery/separator_assembly_drawing
gallery/separator_assembly_drawing_mid_section

Figure 2. Assembly drawing.

Figure 3. Midsection drawing.