Experimental unsteady and time average loads on the blades of the CP propeller on a model of the DD-963 class destroyer for simulated modes of operation / by Stuart D. Jessup, Robert J. Boswell, John J. Nelka.

Boswell, Robert J.; Jessup, Stuart D.; Nelka, J J

doi:10.5962/bhl.title.47522

Cited by 5 publications

(8 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results presented here for circumferential variation of hydrodynamic loads follow trends similar to results presented by Boswell et al (1976aBoswell et al ( , 1976b) for a single-screw transom-stem configuration and results presented by Boswell et al (1978) and Jessup et al (1977) for a twin-screw transom-stern configuration.…”

Section: Operation In Calm Water Without Hull Pitchingsupporting

confidence: 90%

“…The variation in the measured experimental conditions and the blade loading data for repeat runs is similar to that documented by Boswell et al (1978) and Jessup et al (1977) showing that the variations in the mean forces and moments were +4 percent over all the runs.…”

Section: Accuracysupporting

confidence: 86%

“…Also shown is a phase shift in the peak loading between 90 and 135 degrees (also see Figure 11) , which may be related to the outward turning of the vertical velocity due to the hull. Table 3 compares the results presented here for hull pitching in calm water with the same type of results presented by Boswell et al (1976aBoswell et al ( , 1976b for a single-screw transom-stern configuration, and with results presented by Boswell et al (1978) and Jessup et al (1977) for a twin-screw transom-stern configuration. The results presented in Table 3 indicate that the experimental results on these three configurations are consistent.…”

Section: Esupporting

confidence: 61%

“…The experiments were conducted under carefully controlled idealized conditions in which sinusoidal hull pitching motions and regular head waves were independently varied. Experiments with hull pitching were conducted on three hull forms, two of which were reported previously by Boswell et al (1976aBoswell et al ( , 1976bBoswell et al ( , 1978 and Jessup et al (1977), and the third of which is presented in this paper.…”

Section: Introductionmentioning

confidence: 94%

See 3 more Smart Citations

The effects of hull pitching motions and waves on periodic propeller blade loads / by Stuart D. Jessup, Robert J. Boswell ; presented at the fourteenth Symposium on Naval Hydrodynamics, the University of Michigan, Ann Arbor Michigan, 23-27 August 1982.

Boswell¹,

Jessup²

1982

Self Cite

View full text Add to dashboard Cite

II neceaaary and identity by block number) Unsteady Loads Waves Dynamic Pitching ABSTRACT (Continue on reverse side it necessary and identity by block number) Fundamental investigations were made of the effects of periodic hull pitching motions and waves on the periodic loads on propeller blades and bearings. These periodic loads were measured during carefully controlled model experiments in which the periodic hull pitching motions, regular waves, and relative phase of the hull pitching to the wave encounter were systematically and independent]. y v.aried. The periodic blade loads were calculated (Continued on reverse side) DD 1473 EDITION OF 1 NOV 65 IS OBSOLETE

show abstract

Section: Operation In Calm Water Without Hull Pitchingsupporting

confidence: 90%

Section: Accuracysupporting

confidence: 86%

Section: Esupporting

confidence: 61%

Section: Introductionmentioning

confidence: 94%

See 2 more Smart Citations

The effects of hull pitching motions and waves on periodic propeller blade loads / by Stuart D. Jessup, Robert J. Boswell ; presented at the fourteenth Symposium on Naval Hydrodynamics, the University of Michigan, Ann Arbor Michigan, 23-27 August 1982.

Boswell¹,

Jessup²

1982

Self Cite

View full text Add to dashboard Cite

show abstract

“…2 In the past, there have been a few publications about CPPs' experiments in water. In 1978, Boswell 3,4 And in 2013, I Funeno et al 1 measured and computed the blade spindle torque of CPPs in open water. Water test is important and necessary, but due to its difficulty and high costs, ground tests are more widely used.…”

Section: Introductionmentioning

confidence: 99%

Removal Notice: Simulation of dynamical loads for large controllable pitch propellers ground tests

2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

In order to insure the large controllable pitch propeller's reliability in its whole life cycle, it should be exhaustively tested. Water test is important and necessary, but due to its difficulty and high costs, ground tests are more widely used. This article focuses on dynamical loads simulation of large controllable pitch propellers, which is the key problem of ground tests. A centrifugal loading device was designed by the principle of couple to simulate the loads of bending moment and blade spindle torque to pitch control mechanism, and it was confirmed by finite element analysis. Finally, the dynamic loading test system was proposed for large controllable pitch propellers onshore tests. The results of stability pitch test and controllable pitch test show that the simulation is effective and accurate.

show abstract

Numerical Simulation of the Hydrodynamic Performance and Self-Propulsion of a UUV near the Seabed

Liu

Mao

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

Unmanned underwater vehicles (UUV) face maneuverability and rapidity challenges when they are applied for detecting and repairing submarine oil and gas pipelines, and fiber cables near the seabed. This research establishes numerical models of the bare UUV and self-propelled UUV near the seabed using the computational fluid dynamics (CFD) method. The effect of dimensionless distance Hd and ReL on the hydrodynamic performance of the vehicle and the interaction between the hull and the propeller is investigated. The range of Hd is 1.5D–10D, and the ReL is 9.97 × 105~7.98 × 106. Findings indicate that: (1) There is an obvious strong coupling between the hydrodynamic performance of the bare UUV and Hd. With the increase of Hd, the hydrodynamic performance such as Cd, the absolute value of Cl and my decreases continuously and finally tends to be stable. The absolute values of Cd and Cl increase with the increase of ReL. The change trend of my is opposite to that of Cl. (2) The variation trend of hydrodynamic performance of the self-propelled UUV with Hd is consistent with those of the bare UUV. Additionally, it increases to some extent, respectively, compared with the bare UUV. (3) The self-propelled characteristics such as t, ηH, w and ηi are weakly related to Hd. The t and ηi increase with the increasing of ReL, while ηH and w decrease with the increasing of ReL.

show abstract

Experimental unsteady and time average loads on the blades of the CP propeller on a model of the DD-963 class destroyer for simulated modes of operation / by Stuart D. Jessup, Robert J. Boswell, John J. Nelka.

Cited by 5 publications

References 2 publications

The effects of hull pitching motions and waves on periodic propeller blade loads / by Stuart D. Jessup, Robert J. Boswell ; presented at the fourteenth Symposium on Naval Hydrodynamics, the University of Michigan, Ann Arbor Michigan, 23-27 August 1982.

The effects of hull pitching motions and waves on periodic propeller blade loads / by Stuart D. Jessup, Robert J. Boswell ; presented at the fourteenth Symposium on Naval Hydrodynamics, the University of Michigan, Ann Arbor Michigan, 23-27 August 1982.

Removal Notice: Simulation of dynamical loads for large controllable pitch propellers ground tests

Numerical Simulation of the Hydrodynamic Performance and Self-Propulsion of a UUV near the Seabed

Contact Info

Product

Resources

About